A lot of these business groups use both parties to carve out anti-competitive legislation. Most of these are barriers against small businesses to prevent a breakout into the larger market. That is why so many laws are predicated on the number of employees a business has. The cost of jumping that barrier is extremely high and often prohibitive to smaller businesses.
With some notable exceptions, businessmen favor free enterprise in general but are opposed to it when it comes to themselves.
--Milton Friedman