I know what quid pro quo means, dippy. You saw the "something for something", yes?<quoted text>Try this: Tit for tat or: one "good" turn deserves another.
That is really what "quid pro quo" means.
Get it now?
It's best not to go with the literal translation of some Latin phrases, but you did a great job googling!
What didn't make sense was "it does seem that they may be subject to their own morality."