You'd think, but year after year we get stories like this. Sometimes it catches up with people [1], many times it seems they get away with it [2]. The main difference seems to be how much money they're worth, if they're elected or just "regular" employees, and how good their connections are.

[1] https://en.wikipedia.org/wiki/Darleen_Druyun

[2] http://www.forbes.com/sites/judystone/2015/02/17/the-sham-of... - goes into more, but the relevant part is about 2/3 down. Search for "Rick Scott pushed".