It feels like there ought to be means to personally penalise company directors for stuff like this. I suspect they'd take much greater interest in paying employees properly if their own necks were on the line.
All too often, large businesses treat fines for breaking the rules as just another operating cost.
Let me guess... They'll be punished with a fine? Fines aren't punishments to big companies, they are just the cost of doing business! When companies do crimes the board members need to be locked up! and not for like a week/month, for like several years with no opportunity to get out early due to being rich!