Wunderhein controls most of the Brawn thanks to his family fortune and his ability to do business. 

He is the sole owner of The 'Nest' which helps gives him even stronger hold on the students. 

Thanks to his connections amongst the darker side of the school, he has built up a supply of everyday things to use to pay or bribe students with.

It is widely known that he takes care of those that he favors, although he will except something in return eventually.