You've conjured up this image in your head of one of "them liberals" who just LOVES big government. WANTS the government to control EVERYTHING, and WANTS a 3.8 trillion dollar budget.
You're wrong. I think we should spend far, far less. I also think the government should keep out of our lives as much as possible. I think we really, really don't need to spend $45 billion on new tanker aircraft and $150 billion on a super-fighter aircraft built for a war we will never fight.
You're missing the point entirely. I'll spell it out for you.
Certain services cannot be provided in the free market in a manner that is fair. Sometimes, we as a people decide that it's a necessary service that requires either government oversight or government control. Here are some examples:
Electricity. It is physically impossible to provide electricity in a truly open market. By physically impossible, I mean against the laws of physics. You can't have different power plants supplying power to two different houses on the same block. It's impossible without duplicating infrastructure. Electricity is a natural monopoly, and monopolies left unchecked are prone to abuse. Instead, the DoE regulates and supports energy monopolies to make sure every American can turn their lights on. This is an example of government oversight, private companies with strict control to prevent abuse. And if you think electric monopolies with no oversight wouldn't be abused, well, read a history book. We, as a people, decided that electricity was a basic utility everyone needed access to.
Environmental Protection. Don't start on global warming, I'm talking about general pollution. Did you see Beijing during the olympics? The air was so thick with smog it looked like the place was on fire. Our country used to look like that, in the height of the industrial revolution. We burned coal without even attempting to filter the exhaust, we dumped whatever chemicals we wanted whereever we wanted, because it's cheaper. Do you really think every company would play nicely when it comes to hazardous waste if not forced to? Most would be reasonable, but there will always be that one guy who decides to cut some corners and dump his ammonia into the river that feeds the next town's pipes. So we have an EPA. Regulating practices that, while cheap and good for business, directly harm people and the environment.
Fire protection. We actually used to have private fire fighters in this country. You paid them a bill for protection. If you didn't pay and your house set on fire, they would drive up and demand payment. If you couldn't pay, they sat there and watched your house burn to the ground, only to make sure it didn't spread to your neighbors. They paid their bills, after all. It became obvious that nobody deserves a destroyed house, so we turned over this necessary service to state and local GOVERNMENT to run. And to make sure nobody skimped out on their "fire bill," we fund it via taxes. Everyone pays a share.
Police. Good Lord, imagine privatized police forces. They'd basically be mercenaries.
Here's one: The Post Office! I bet you've referred to the post office as "bankrupt" before. Guess what? The post office is not designed to turn a profit. It's designed to provide cheap communication services to everyone, because our founding fathers realized that communication was so important that they put the post office in the constitution. To make sure the services stay cheap, we use taxes to support them.
Airwaves. We have an FCC because there are physical limitations to the electromagnetic spectrum. Allowing private business to do whatever they want with it would create an enormous mess. Two signals cannot exist on the same frequency. You could literally steal a market by planting a stronger transmitter next to your competitor's. Somehow we managed to get this "think of the children!" mindset and tasked the FCC with making sure poor little Billy doesn't see boobs or hear bad words, but that's another issue: parents in this country refusing to raise children on their own and demanding that schools and government do it for them.
Highways. Critical infrastructure without which our country would not be what it is. Private business simply has no incentive to build these. Wal-Mart will never make back its investment if it builds a road out to Sioux Falls, SD. Unless we go with "every road is a toll road," but man, I hate those things.
Do you know why we have Medicare? Because at a certain age, you're no longer physically capable of work. You can't hold a job to keep that health insurance, can you? Once your income is gone, paying for health insurance on your own is also difficult. It varies: some people make it to 80 before they slow down, and others can barely walk at 55, but it eventually happens to everyone. "Well they should have saved money," you say. Yes, we all try that. Sometimes, however, the unfortunate happens. The stock market tanks hard, I for one lost a fortune in the last three years. Maybe you lost your job earlier than expected, sometimes that's not in your control. There's always the unexpected, and there will always be people who did the right thing but still ended up short. I think a guy who puts in 40 years as a hardworking American deserves to be taken care of, regardless of the size of his wallet at the end of those 40 years. Apparently you don't agree.
You're right. Social Security was not intended to cost so much. People live longer, and doing so costs more. A lot more. Cost to survive goes up exponentially in those last few years. So, what? Abandon the whole thing? Stop paying after a certain age? "Hey, we only planned on you living to 70, so after 70, you're on your own!" Conservatives rant and rave about government pulling the plug on grandma, but don't you see that they're doing the opposite? Government is making sure grandma has a safety net. Private industry would have left her out to die, and before Social Security, it happened constantly. You appear to be advocating... what, exactly? Ditch the whole program?
These are just a few examples of markets that don't work, for whatever reason, left to their own affairs. Either it's physically impossible, or the service is too essential, that's when we have government step in, because government, in theory, is accountable to the people. Wal-Mart is not.
I want you to tell me specifically which government programs you think should be cut. I hear constantly from conservatives this rant about smaller government and less spending, but rarely any specifics. Worse, when conservatives take power they don't reduce spending, they increase it!
Five bucks says you don't mention any military items!
Edit: And here's another great conservative mental gymnastics piece: Why do you think the government should stay out of healthcare but SHOULD decide that marriage is "between a man and a woman" because that's "traditional?"