I have seen things go terribly wrong from unintended but logical results of KPI, bonus conditions et al.
I recall having a very difficult time with a team lead who fought everything Agile tooth and nail. Finally one day the truth came out: He told me that his annual bonus required him to do the opposite of everything I was suggesting and there was no @#$%^ way he was going to give the money up.
Be careful what you ask for, you might get it!
by Michael Badali