The obvious solution is to work somewhere else.
Yelp only employs people on such low wages, because there are people willing to work for that money.
Rather than moan, do something practical, like apply for a different job that pays more.
Eventually, the cost of administrating the high turnover will become higher than the value of work they are doing. At that point, Yelp will change their practices.
Of course, waiting for it to happen is going to bankrupt anyone who is paying to work, which is what this girl is doing.
McD is a good option.