Hypocrisy comes in different flavors.
Tearing down a political system that made you successful and famous is like Wallace Shawn cutting the rope on the cliff in The Princess Bride.
Plus, it makes any of his complaints about "the system" pretty damn hollow. Unless you have a taste for situational irony.
You're viewing this in the wrong way. You might have a point if you believe that Rage had a goal to be successful. Where as I view them as having used an existing platform as an avenue to forward a message and their monetary success was more of a side effect and one not necessarily sought.