Neither. The most influential force on government is the federal workers union which accounts for millions of votes. It isn’t so much that money buys influence for any specific industry, but the votes that organizations like unions, welfare recipients and the like carry.
You ought to actually go to DC and take a good look at what is happening there, in detail. I’m not speculating about this - I am testifying to what I witnessed in over a decade in DC living and working and being politically active in that environment.
The bribery is open, ubiquitous, and dominant. That is the problem. Nothing else can possibly get fixed until that does.