Make it illegal. Give rewards for anonymous tips that lead to prosecution like it already exists for IRS tax fraud tips.
That’s just not possible because it’s unenforceable at best and ignores the myriad ways around it “legally” that still would be workable even if it’s “illegal”
For example it’s illegal to hire foreign undocumented labor but in literally zero of the companies who have been raided recently the only people punished were the working people who are just trying to live
I’m sure the current authoritarian government will get right on that.
We haven't even tried to solve this any other way.
Pitting people against each other should be a last, last, last, resort.
Low trust is VERY expensive. It's asinine to introduce it to anywhere it doesn't already exist.
Americans will try anything to stop corporate wrongdoing--except making it illegal.