You know what happens to the chart if we ended the wars in Afghanistan and Iraq while eliminating the Bush tax cuts (which Rove admitted were engineered to be a time bomb for Dems btw)? Not only does it take a sharp decline, but its only slightly more expensive, by about a few 100 billion, than Ryan's plan. without removing the investment in things like schools, infrastructure, and energy and doesn't touch Medicare, Medicaid, or Social Security (they remain solvent for the same time period as Ryan's plan)
The complicated situation we find ourselves was caused by several things
* Decline in revenue base from both tax cuts and job loss/lack of growth
* 2 Wars completely paid for with borrowed money that are still on going (no exist stratagem from Bush)
* Housing collapse caused by ease of credit which was caused by a toxic cocktail of Fed manipulation, FHA polices, systemic banker greed
* Finical deregulation that allowed banks to have less capital to back deposits and make risky investments with said deposits
* Fractional reserve system in general
Most of the problems could be fixed by getting rid of the fractional reserve system by making it illegal because it is fraud. This would remove the strain on the Fed/Treasury by not requiring to ensure depositors funds are insured, make credit availability more in line with market demand, etc while at the same time allowing the deregulations to have nearly no affect on the system as a whole, since the "banks" would only have their own money to risk, not others.