Mostly this problem is contained in the fact that the US makes it so difficult for Canadians to get green cards (you heard it here), but if an American orchestra really wants a player, they have their ways. ↗
The way it works: The orchestra plays a few selections of its own and I terminate the first part of the programme on piano, usually with a movement from a Mozart concerto. ↗
When I was four or five, my father had a general store in Winchester and I don't think the farmers could ever leave on Saturday afternoon until I had been placed up on the counter to sing. ↗