Give me a specific example of this allegation.
And tell me how Ronald Reagan ran his campaign without being backed by rich guys.
I assume you know how to work google, its very easy to see where the big backers are for Cruz, and not surprisingly the are largely the same cast of characters who have given us every Republican candidate for decades.... You think Cruz is going to rock the boat on them you are naive....
But to get you started, here’s one of many examples that Cruz is the backed by the same money men that have owned the GOP for decades.
http://www.nationalreview.com/article/416643/meet-ted-cruzs-billionaire-donors-eliana-johnson
As to you inference that money in politics is the same now as 1980, it has always been part of the game, but there were no SuperPACs in 1980s.
Cruz cannot structurally change the system, because he is beholden to it. He can throw a lever, here or there, but no substantive or structural change would be initiated by Cruz any more than would be initiated by Clinton.