Recently Oscar winner AR Rahman performed at a concert* organized on the occasion of Mulayam Singh's birthday. I am sure he would go even if Lalu invites him. Or if Lalit Modi or Rahul Gandhi invites him. And no one would raise an eyebrow. Why? Because apparently Rahman being an artist would be doing all these shows to "earn his bread". The fact that he would already be a millionaire and hence performing at each function where host is ready to pay should not really be counted as "earning bread" but can be seen as an attempt to keep the "rich and powerful on one's sides", could be ignored.
I think being an artist gives him the privilege of not being conscientious when it comes to grab money making opportunities. There can be some more professions like this. Doctors would treat any sick person no matter his/her background; lawyers can defend any accused if one pleads not guilty. Others are not so lucky. If you work in a firm which is considered doing unethical business or corrupt - it is often taken as a blemish on your character too.
Now, after becoming rich and powerful helped by keeping conscience locked in a closet for best part of life when one is young and energetic, if these artists or professionals suddenly start pretending to have a more genuine conscience than yours and mine, and being holier than the common man, what do we do? I discard such individuals and their claims as trash.
* The Concert: https://www.youtube.com/watch?v=S1f2WepFA4Y