serious question...

why don't some of the players just refuse this? I understand wanting to play for your country but they also have to make a living. Footballers have a short career to make their money and in the case of someone like Aaronson he's on his last shot. Bomb this time and he's playing a back up role on some MLS team. I can't picture any coach is going to hold that against them given the super short time frame for matches.