The masses out there in "Jerkwater, USA," as the fictional Sam Trautman put it, don't know or care about billionaire patrons. That is a class of people they will never meet, interact with, or know the desires of.
The masses, the ones that watch Fox Noise 24/7, and will never travel more than 500 miles from the place where they were born--they will fight for a myth that they have been sold by Republican propagandists. They aren't consciously fighting for the Koch Brothers or the Mercer family. They'll never have any contact with those people in their lives. They THINK they are "fighting" to protect their families, their religion, their country, and their way of life, which they have been convinced is unimprovable.
Agreed that the mass of Republicans supports their privileged few, but they do so unconsciously. To THEM, it really is America first, but they can't be allowed to realize which America is really coming first. They must THINK (thus, Fox and National Hate Radio) that their almost-Mayberry is the paradise they are protecting with all those guns in their basement. If they KNEW that they are being exploited, and in fact are valued as nothing more useful than a screwdriver, they might not be such enthusiastic supporters of the Republican Party.
Our problem is that we have allowed Fox News and the propagandist media to convince them that their votes are protecting themselves. In fact, their votes protect those who would deny them--along with the rest of the country--the very best that our country COULD be.