Establishment politicians claiming the mantle of the Tea Party used that to get elected in the notable 2010-14 elections, and you're shocked, shocked that professional politicians lied? Quelle horreur!
And didn't notice that when presented with such blatant betrayal, the Republican base picked a non-professional politician as its Presidential nominee, who ran on a non-establishment platform, in the face of a near total revolt of the GOPe outside of Reince Priebus and enough of the RNC, and, you know, won the election?
Let me turn this around: who specifically would you recommend as being outside of the "orthodox power structure" for his cabinet picks?
Heck, is Trump, according to you, by definition part of the "orthodox power structure"? Did getting elected President make him so, if not earlier? Just what are you asking for?