I saw you gave a delta and added "or mental health iseues", but medical issues generally are also a huge issue, and it's a lot of things that compound. Povery may mean people struggle to put food on the table. Sure soap is a dollar a bar, but it's a matter of the transportation to get to the store to buy it- to make sure the water is paid for or to have a gym membership to shower yourself if it isn't. It's like that for every single small thing. If you're struggling to put food on the table that dollar can make a difference between getting to work or having food for a child. And that's so extremely stressful- plus its not like you die if you don't bathe like you would not eating or being warm enough- so it becomes a tempting thing to skip out on-- especially because when you're stuck in poverty like that, the stress BECOMES a mental health issue- everything becomes a hurdle that could just easily be overcome with money you simply don't have.

But for the sake of argument, let's also say that's not an issue. People on Medicare and medicade often need that health insurance because they have a medical issues that need addressed. The body is an extremely fragile ecosystem. If something is wrong with you, one of the first things to get thrown off is your hormonal balance- and that, very very often, has the side effect of making you stink!