we know humans are corrupted easily when given so much power

Are people corrupted by power?

Or is corruption a means by which people accrue power?

is there any other option to stop them, other than death?

Mass opposition movements can quickly defang a corrupt official. At the end of the day, you only have as much authority as other people are willing to give you.

But social networks of patronage give each individual a strong incentive to defend the corrupt organization as a whole. So the network only fails when an even greater number of dissidents stop taking orders.

You say this as if that weren't the desirable option...