Could you explain more what you mean? Like after 20% of someone's W2, the gambling house pays out 95/100 times? Trying to understand how this regulation works, I'm intrigued by the idea of progressive levels of taxation against industries but I don't know if this is what you're arguing.
Simply put, if a gambler shows up in court with a W2 and payouts to a gambling house, they get summary judgement against the house.
This works well because once codified ("no gambler shall owe more than 20% of their annual income to any gambling house, individually or in the aggregate") it triggers an unrecorded liability on the gambling house's clientele. In other words, the stock becomes radioactive , unless the gambling house has strong controls around client onboarding and monitoring. Auditors are never going to sign off on financials that have a huge liability unless it is proven there are strict controls in place to not let degenerate gambling continue.
The same principle could be applied to universities as well.
Basically, you have to shift the risk to the party abusing the system (in this case, not the system, but the addiction).