Here's just one area where that is not true:
Lobbying expenses
1998-2012
Koch industries-- about $80million
Soros Fund Management/Open Society Policy Center -- about $13 million
When you add in all the other donations and superpacs, it's not even close... they bought the radical right, created the "Tea Party", and have successfully fought to keep "trickle down" economics destroying the middleclasses while they pay the lower effective tax rates than the average successful doctor or dentist or lawyer or small businessperson