They don't have to pay well, people working that kind of job don't have a whole lot of options. One leaves 10 more want to take their place. Employers are having a very easy time of it.
I can't say I share your perspective, but then again living in Europe I'm probably not objective.
What would it solve? Do you know the reason why the gold standard was abandoned?
If you're starving, I'll give you food without expecting anything. Taking advantage of starving people in order to make profit is inhuman.