These numbers are fun to kick around.
http://ballotpedia.org/Net_worth_of_United_States_Senators_and_Representatives
I read an article a while back that showed the net worth of a few congressmen before they stepped into office and then again about 5 years after being elected. Their net growth was unfathomable......
You might know it wouldn't be from the measly $174K annual salary they get for not doing their jobs as members of Congress... But that's just Congress; there are a lot of other elected officials as well, making varying amounts of money - probably most of which is not "earned" either...
A long time ago, I gave up thinking any politician has my best interest at heart.