Write the law vaguely and make punishments potentially scarily harsh, the general idea that if companies would like to continue to play dumb farmer, they better hope they don't run into someone with a strict personality. In law, there is the notion of both the latter and the spirit of the law, so this notion isn't unprecedented.

You might think this is a bit crazy, and you'd be correct, but it's nowhere near as crazy as thousands of things in the actual reality of our current legal system (banks crashing the global financial system, yet no one was guilty of anything, black men being executed at point blank range and the cop walking away, etc etc etc etc etc).