Power may be corrupting some of those who manage to get to the top, and some of those who get a majority of votes may not be the brightest, but most 1st world gov'ts are pretty honest. Not only because we have free media that is watching every step these people do and will make them resign at the smallest mistake.
But, if you think that "they" are that bad, then you can just become one of "them" and do it better. I would recommend your local Pirate Party to start.
This is true, in the same way that I'd be honest if you were to ask me a simple yes/no question, and I responded with a page-long expression that took a day to evaluate to the actual answer. Which is why ...
> you can just become one of "them" and do it better
... is doomed to fail. The problem isn't morals, it's unbounded complexity. People are just the substrate that the bureaucracy runs on. Feeding it ever-more people and resources (exponential technological growth) only compounds the fundamental problem - when something is not understandable, it's completely unaccountable.
It's only 5 years since the Pirate Parties started (first in Sweden), and it looks pretty good (in Germany they have now double diggits in the polls). Another 5 years and Pirates will be part of the gov't of several EU countries, I would guess.