I read somewhere that removing corruption is a bottom-up process, not a top-down one. That is, the culture has to change. There has to be a grassroots movement

I read somewhere that removing corruption is a bottom-up process, not a top-down one. That is, the culture has to change. There has to be a grassroots movement to eliminate corruption. If society as a whole does not care about it, then it matters not whether the people at the top are corrupt or not.