There are laws against quid pro quo (https://en.wikipedia.org/wiki/Quid_pro_quo https://en.wikipedia.org/wiki/Quid_pro_quo), but i'd be curious if someone could

There are laws against quid pro quo (https://en.wikipedia.org/wiki/Quid_pro_quo https://en.wikipedia.org/wiki/Quid_pro_quo), but i'd be curious if someone could point out a clear and obvious case of quid pro quo that is documented, which results in real consequences.