Lots of people don't know about labor boards so I think they get away with it most of the time. In ten years across seven restaurants in the restaurant industry that was the only time I was paid time and a half for overtime, lots of places do cash overtime instead. Even the chains have stolen labor from me, did a month at Applebee's and the manager would "save me time" by clocking me out 15 - 20 minutes early at the end of the night (it took seconds to clock out). Illegal immigrants in particular know that they are unlikely to get their last pay in the restaurant industry, they aren't likely to sue or contact the authorities, they also get screwed on workers comp claims when they get injured. We talk a lot about unfairness for waitstaff but that's paradise compared to the back of the house. It's absolutely commonplace and likely happening at any restaurant you go to.

In PA they have to pay double whatever is collected, so they wrote a similar check to the labor board, that's how they are funded and I think it's revenue positive.