they won't get the donations for the next campaign, that's what. all that money will go to their opponent and the companies will probably take out a PAC to run ads against them.

politicians aren't self-sacrificial noble people either. they are in it for the money and power, and for the huge benefits they will get post-political career by coming lobbyists themselves.

I don't think there's anything stopping that, except they probably wouldn't give copious amounts right away. Give you a little, see if you dance for them, and then if your did, more money. Can't give you the gravy train early, you might do what you're planning on doing, even!