OPPORTUNISM
The policy or practice as in politics, business or one's personal affairs of adapting actions, decisions to expediency or effectiveness regardless of the sacrifice of ethical principles.
Taking advantage of an "oppertunity" that benefits the taker WITHOUT CAUSING HARM TO OTHERS is the only opportunity that decent people should avail themselves of.
The indecent look for opportunities that will both benefit them and harm "the other". The rotgut rodent maggots spend their entire lives doing that. For sport.