If everybody on the crew tips a dollar as they should if their overweight/overstuffed baggage was handled, it works out to a decent tip. Don't forget that crews are getting van rides 6 to 12 times per trip, so there is nothing wrong with tipping a dollar. Going through $6 - $12 of tips per trip is very reasonable and more than covered by your non taxable per diem. So no, it is not embarrassing and condescending. And if you are using that as an excuse not to tip, that is beyond embarrassing and dou@#$y.