In some countries (e.g. Uruguay) it’s possible to ingrain anticorruption ideals into the fabric of society. This lowers the overall level of corruption as citizens are more likely to feel it’s wrong and they’re raised to call out corruption when they see it. I guess we’d call this “social responsibility”. Of course, the social aspect must be coupled with governmental and legislative changes aimed directly at increasing transparency and reducing corruption—this is what was done in Uruguay, at least.

Corruption isn’t eliminated entirely but is drastically reduced. Taxes then get spent on society instead of corrupt politicians. The result is more bureaucracy but it also placed the country lower than the US on the Corruption Perceptions Index (CPI)[0]. CPI has its own measurement issues but is the best we’ve got.

[0] https://en.wikipedia.org/wiki/Corruption_Perceptions_Index