On a serious note, the people that stand behind Gaga are miles more powerful than the people that stand behind Miley. From her label, manager to her executives etc.
Gaga has a contract with Interscope, and just cuz Miley can pay for her **** to her label and even buy herself out, Gaga can't, simply because Gaga's contract is hundreds of millions more than that of Miley
And so on. No one really counts on Miley to save the sales etc. (talking about her label) whereas Interscope has always counted on Gaga and when sales went up for the first time in a shitload of years (2011) Adele, Gaga and Eminem were the ones stated as "most important figures in the increase in sales" by several sources including Billboard, MTV, RS etc.
Gaga is powerful, but not more powerful than Jimmy Iovine and other executives, neither is any other pop star that existed EVER.