I hope you never have to experience how hard it can be to actually get your money. And as I said, even if there is a case it can take a very long time before you see any money. For someone living paycheck to paycheck this can mean losing their house. Put the risk of losing your job for making a case on top of that (employment at will). I understand completely why many workers don’t do it. The system is made to work against them.
The rules are intentionally vague and information is intentionally not easily available. Additionally, many workers are not in a position to claim their rights because they are living paycheck to paycheck and legal processes are expensive and last very long.