The way we run any election in this country, it take a LOT of money to campaign. Candidates need wealthy backers to get their promises in front of the people. And, as soon as they're elected, they need to start lining up money for their next run. It's only natural that their decisions are going to favor those wealthy backers.

Notice I used the word "promises" - that's only so much bs to get people to vote for them. There are exceptions to that rule, but far too few.