Is there a term for the logical fallacy that other people have it worse, so you should be happy?
Example: I fall down a staircase, breaking my leg. The next day I go into work, and someone (inevitably) says "Phfeh! That's not bad! Let me tell you about the time *I* fell down the stairs!"
I suppose this also covers the 'third world problems' saying. "You didn't get your last paycheck? Phfeh! First world problems. In Isreal they are shooting at each other!"