I personally know that in the old days, if you wanted a Bank, Radio Station or TV station you would call your congressperson and he would have his staff push through the paperwork for a percentage of the deal.Kinda of like the Mafia if you wanted garbage pick up or a building built.
Now they just buy stocks on short them on news that the staff has put in bills.
I remember reading about LadyBird Johnson, going through Texas and telling stations to sell out, or she'd have them shut down.