If nothing else you can be damn fucking sure they won't even attempt to fulfil wishes that constitute straight up crimes (such as exposing yourself to a minor).
As for everything else, they probably don't have any super specific rules beyond that, what tthey likely have some kind of genericly vague, vibes based, catch all term that "wishes have to be in good faith and good taste"
And how is that supposed to work ? You can't fix the healthcare care system or economy in a day, so non wealthy people would still struggle to live as politicians whilst those changes are being worked on, meaning there's little motivation for them to join politics, and independently wealthy people who are just in it for the power wouldn't give a fuck about being badly paid. Look at Trump. He doesn't even take a salary, because he's corrupt and wealthy enough to not need it, so his salary being low would matter fuck all to him and other corrupt pieces of crap like him.