I don't think we can ever get rid of corruption, in an absolute sense.

Because when humans get into power, they inevitably use their power to benefit themselves, and exploit the weaker people.

That's what "power" means - making the weak ones, bend to your will.  And do what you want, not what they want.

Obviously, this is just a part of human nature.  We all like the thrill of power. But politicians experience this thrill especially strongly, when the electorate actually votes for them.  This must give politicians huge satisfaction, when the weak ones actually ask to get trodden on!