You were never taught that corruption is bad? I was. I was also told not to lie, cheat, steal, harm others, etc.

I personally don’t recall being taught about corruption specifically. I was teach about being a good boy in elementary school but after that i don’t recall any class about how to be kind and good.

and yet people still use drugs.

People are taught that drugs are bad but not much is explained about the underlying problems that make people do drugs, such as trying to cope with high competitive standards since childhood.

How do you prevent people from promoting corruption and making role models of the corrupt?

We live in a corrupted society, i think the starting point would be to fix education (which is already “enforced”) in such a way that it doesn’t promote corruption of any sort