No I would argue that power doesn't corrupt, and in addition I doubt that a very comprehensive human nature is even understood being that we are complex social beings. Power doesn't corrupt but the institutions of power if not properly checked can be and in fact will be corrupted, and if they are not corrupted then it is because the system of delegating power was already extremely poor (as in monarchy).
And I don't mean checks and balances in the capitalist sense, because I would say that a couple of branches of elite bourgeois politicians checking one another is really not "checking" one another.
“How in the hell could a man enjoy being awakened at 6:30 a.m. by an alarm clock, leap out of bed, dress, force-feed, shit, piss, brush teeth and hair, and fight traffic to get to a place where essentially you made lots of money for somebody else and were asked to be grateful for the opportunity to do so?” Charles Bukowski, Factotum
"In our glorious fight for civil rights, we must guard against being fooled by false slogans, as 'right-to-work.' It provides no 'rights' and no 'works.' Its purpose is to destroy labor unions and the freedom of collective bargaining... We demand this fraud be stopped." MLK
-fka Redbrother