The whole article is about how DOL mostly doesn't go to bat for people. Of $50 bil in wage theft, DOL recovered ~$3 bil.
The lawyers will though.
It looks like corporations make far more money stealing from workers than they'd ever lose in their dealings with the DOL. If enforcement were inevitable and fines high enough to actually hurt no company would ever dare steal from their employees, but because they do (and at such large scales) we know that they make more money from theft than they risk losing by stealing.