Corruption is the natural end result of Capitalism.

Do you really expect that in a society were "Greed is good" Lawmakers and Law-enforcers would magically not be seeking to maximize personal upsides like everybody else and positions of power within the State that could be used for such personal upside maximization wouldn't attract smooth talkers seeking to become filthy rich???!

You need to be pretty naive to expect that an environment where the greatest measure of success and discriminator for receiving superior treatment is having lots of money, the people who can get power from salesmanship (which is what politicians are: selers of themselves and of ideas) and being mates with said salesman (i.e. those who get nominated to positions by the politicians) would not be driven by maximizing their personal wealth and the prestige and superior treatment that is given to the monyed.

Given human nature, Capitalism without widespread corruption is about as realistic Communism (the whole utopia of everybody having the same, not the bullshit that the PRC and Soviet Union deem "communism") and, funnilly enough. they both fail for exactly the same reason: Greed.