Nonsense my ass. What fantasy incentive are you talking about? There's no incentive preventing someone from not hiring someone because of their caste and then completely fabricating a different reason.
>We are rationalizing creatures, not rational creatures. Once racism, sexism or caste discrimination stop being strategic, people stop buying into them.
Sure but the point is, it will never be "not strategic".
It's only strategic when it incurs social rewards from some people and no countervailing social condemnation from others.
It's up to us to be that countervailing social condemnation. Even imposing that cost of making up a totally different reason raises the cost of discrimination, and raising the cost of something means people will do it less.
Promoting cancel culture? Personally I find cancel culture too reactionary and too extreme and irrational. Additionally cancel culture often gets shit wrong and ruins the lives of the wrong people. I would say in this case if you participated in such a mistake you should be the one that's put down.
But let's disregard that. For this specific case you can't even know who to socially condemn. If the law can't determine it how can you?
>We are rationalizing creatures, not rational creatures. Once racism, sexism or caste discrimination stop being strategic, people stop buying into them.
Sure but the point is, it will never be "not strategic".