This doesn't explain everyone in your category, though, so a portion suck at saving.
[1] https://www.forbes.com/sites/timworstall/2011/12/16/well-of-...
https://www.reddit.com/r/TrueReddit/comments/1v4t18/it_is_ex...
The 57% figure is much more illustrative, in large part because it conveys an absolute capability which people can lose or acquire.
It would be pretty weird to have <$500 in checking at the same time as 5-6 figures in retirement + home equity, but possible. It helps that 401k is a payroll deduction and there's really no bargaining with yourself on whether to pay the mortgage this month (whereas it's easy to splurge instead of saving extra cash).
You can also loan against 401k (though there are limits, but if you have it for a while loaning $500 would not be a problem, though again fees could make it a bad deal). Advantage is that while you lose the growth for the time of the loan, you are paying interest to yourself, not somebody else.
Yes. Low-paying jobs at Wal-mart and Lowes and some gas stations offer a 401k. The contributions are tiny because the checks are tiny but the company usually contributes as well. These folks aren't as likely to have access to credit.
I'll put this as well: If you are looking to take $500 from your 401k outside of those groups, I'm gonna guess things have gone horribly wrong. Getting a new credit card might be a bit tough because your credit is probably already showing the hurt.
> If you are looking to take $500 from your 401k outside of those groups, I'm gonna guess things have gone horribly wrong
Yes, probably, but the question was is it possible, when the things go horribly wrong. I still think if you have 401k that should be possible.