There's a ton of privately owned mid sized companies that you've never heard of that heavily fund the GOP. The Unihleins that own Uline are a prime example. There's thousands of these multi millionaires out there running companies that make things you use everyday that you don't think of. The guy who owns the trucking company that delivers stuff to your grocery store. The contractor that builds the roads you drive on. The company that rebuilds the pumps that run your local water supply and on and on. There's so many of these people out there that you can't avoid them at all.