Why? Because even a single person has a hard time living in the current economy on minimum wage. Minimum wage means a person is making about $15600 a year, before federal income taxes. Even at $8 an hour, a person only makes about $16600 a year, before taxes. Which means if rent is say $600 a month (the average for a 1bdrm apt in TX), a person is then paying $7200 in rent (if they are able to find an apartment at that rate). Plus utilities (basic) will be another about $1500 a year. Then we figure in food, which means another $300 a month, $3600 for the year. Another about $30 a month for phone, $360 a year. Transportation is going to be at least another $520 for the year, and that is if a person only takes public transportation to work and back and only has to take one bus. If they own a car, it is likely to be more.
With just rent, food, basic utilities, transportation, and phone, things that are considered essential to being able to actually live and work, a person spends $13,180. This doesn't even include any basic toiletry items (tooth brush, toothpaste, shampoo, deodorant, toilet paper, soap), nor does it include any money for clothes or shoes or other things that people usually need to buy sometime throughout the year. Also, a single person will pay about 15% of their yearly to federal taxes. This means a single person making $8 an hour really only brings home about $14,110 a year and I have shown that in TX they would spend at least $13,180 just for essential expenses. That leaves less than $900 a year just for those additional things I mentioned if they are living above minimum wage and don't have a car. If they do happen to be trying to support a family on minimum wage or just above, which some are, those numbers, at least for food and utilities go up, plus more of those things that I touched on.
Even at $10 an hour, it would be difficult to take care of a family on $20,800 a year, which is what many have to do. And when you have gone from a higher paying job, where maybe you were making $50K to $60K a year to a lower paying job where now you are making $20K to $25K a year, that is a big difference and not something that everyone can plan for, even if they were able to get that job before the bulk of any savings they may have had ran out.