"Will we ever have a President who is not corrupt, and that is actually for the people ever again?" yes. Ron Paul proved it can be done though individual donations and without wallstreet. Having said that..

Steven Colbert and Jon Stewart for President and Vice President!

No, because anyone who gets there is:

i) Obligated to certain people, companies and vested interests who paid/helped him to get there

ii) Disconnected from the life of an ordinary American so cannot empathise or see what effective policy might be

iii) Has all the wrong priorities, for example they get briefed every day on terrorism but rarely about the effects of trespassing on civil liberties, so they think terrorism is far more important

iv) very ambitious and duplicitous as a personality type, in order to have the drive and ability to get there

v) almost always has a Law/History background, so can rarely see the value of good data 

It's not deliberate evil, it's accidental negligence.

Anyone who seeks power is not worthy of that power. Yet someone must be in power to lead.

Really though, do you really believe it the president that actually holds the power?

That would be the corporations considering we are really fascist.  Also, it is mainly up to Congress to act which they haven't been able to do jack shit due to gridlock/partisan voting hence their terrible approval rates.  Since corporations are now considered people then I suppose it technically isn't a lie to still say for the people by the people.

counterpoint

Cut the base pay of politicians down to that of your average high school teacher.

That way you only get those who truly want to serve the people into the positions.

The world is simple. 95% of the people have next to abolutely zero impact and influence on "the world" so they have no responsibility toward it but for their own sake.

4% of the people of the world are intermediates with enough influence or power (media, marketers, artists, journalism, deans etc...) to be held responsible for the bullshit they do.

Then 1% of the people (even less) are directly and mainly responsible for all the shit that happen in the world (governments heads, including the governments, corporations/lobbies head, banksters...)

And because all these (few) people work together, it's hard to stop greed, corruption and bad (but precisly wanted and calculated) decision just by talking about the president.