Most people that claim they cannot pay the bills make more than enough to pay the bills and save but get stuck into a loop of overspending and buying things without thinking. This seems to be a very specific American issue.
I grew up in a country where the average monthly income is half of here in the US even though groceries and rent is probably about the same. What you see is people go out of their way to buy cheap groceries, and think hard before buying stuff they don't need. What I see here in the US is that even the poorest people seem to be on a spending spree, or have a hard time to lower their standards to something sustainable. There seems to be a bigger shame in the US to try to be frugal and not spend a lot of money. We need to teach people how to live with 3000$ per month, that is still a lot of money.