I do realise it's petty, but have had a bad day, so thought may as well vent somewhere.
My company usually gets a couple of trainees every year for a couple of months- we have some sort of agreement with universities who send us students who need to do a placement as a part of their degree, or who just look for work experience. These are paid, not sure about the amount, definitely not anything like a regular salary, but they also get limited responsibilities and workload as most work PT. Usually they are young-ish people in the last year of their degrees. They are then attached to one or possibly two, occcasionally three teams, depending on what they need for their course.
Every year we go for a Christmas meal with my office. Some time ago one of my colleagues proposed we chip in to cover for the meal(s) of trainee(s) if any are placed on our team, and of course they get invited to come to the dinner and it became a bit of a tradition. It's never been an issue as they have been some really nice, helpful people and not earning much, so no one objected.
This year we have two trainees. They are both mature students, and both a lot better off than anyone on the team really except maybe for the team leader. Both are doing the degree because they seemed bored with their previous jobs, which in itself is not an issue, and both have high earning husbands. We're a bit strapped for cash at home at the moment, and I don't really want to pay for a meal for someone who, well, does not really struggle financially unlike some of our previous trainees. Plus, they are not actually really nice, don't want to get in a lot of detail but again, don't really feel like paying for a meal for someone who has been unpleasant and patronising. I feel I probably should mention it to our team lead who organised this years meal, not to look awkward on the day, although it's probably going to be awkward anyways as she seems to get on pretty well with them :/