No. My dad worked at Wal-Mart. I know what he made. I also have many friends that work there, and know how much they make after just 5 years.
You start out at $8.50/hr or $17,680/yr per person, or $35,000/yr for two people. After 5 years, I have friends that make $11.50/hr, or $23,920/yr per person, or $48,000/yr for two people.
Again, that is after five years. As for the 'What if they have a kid or two'. The answer is simple: don't have kids until you are financially ready. Or do you naturally expect people to be so stupid as to not do the math and realize that having children and working low-wages is a stupid combination?
You provide all kinds of innane what-if scenarios to stack the deck against modest living. We're providing a worst case, near-minimum wage life to prove that its sustianable in America. Yes, you aren't going to live in opulence - you can't buy a car every 5 years, you won't be able to buy a 60" HDTV every three years, or go out to eat every night at Sizzler. But if you fail at life so hard as to have to work at Wal-Mart, you shouldn't be afforded luxury either. But the reality is that if you were remotely intelligent, two people working at Wal-Mart (either a married couple or simply two co-habitating adults) could easily live in most areas of the US.
Back from the dead, I'm afraid.