Low money to pay bills is better than no money to pay bills. Still gotta eat and live somewhere.
There is something deeper to people not working than just not wanting low wages. If you get laid off from your $70K a year job, you don't just sit at home and do nothing if a $35K a year job is all you can find.
Maybe you do sit at home if you aren't the sole income source. Maybe your child care was costing $3k/month and working for $35k a year doesn't even cover that. For a lot of people, they won't work if the pay doesn't make it "worth it."
I stopped working when my first child was born for that exact reason.