Low wage jobs only net you $40 a week. Thats $160 a month. Even if you pay no income tax, try living on $160 a month in any where America. Thats barely enough to pay for groceries for a single person for a month.
There's also the benefit of food stamps, and housing assistance at that income level. Actual fraud may be rare. I cannot find a good study on fraud in benefits, but I don't think that detracts that safeguards should be put in place.
Food banks and SNAP/EBT and dumpster diving and community living. It's a lower standard of living in some ways, for sure, but you don't have to go to work and get to do art all day long. What's that worth to you?
Even if you cut that in half that's still way more than $40/week.
And no, you're not paying federal income taxes on that low wage income.