Currently the median income in the US is 59K and some change. According to the chart linked 10% of our population is living in deep poverty that is defined as less than 40% of the national median income, 23,6ish. Or roughly an $11 buck an hour job. You can probably survive in rural Indiana on that income but you're going to be in a lot of trouble in a metro area or on the coasts.
My salary is above the median income, yet I still spend time doing other stuff to make additional money. I like toys, I spend money on stupid stuff at times. My point being while I don't necessarily have two or three jobs, I do stuff for pay in my spare time to earn more money. I'm responsible, I show up when I'm suppose to, I do what I'm suppose to, I don't require supervision, I am at times required to handle fairly large sums of money, and it all makes it where it's suppose to.
When our kids were younger, my wife and I both worked 2nd jobs to provide for our family. In many cases our kids had, and we went without. This is the problem as I see it in today's world, people aren't willing to take responsibility for themselves and their families. It's easier to blame the system, the government, the man, whatever for your lack of success.