Well, seriously, I don't think he's actually wearing them that high. I think the low button stance is contributing to the Urkel effect, but the pants seem to be at his waist, not above his ribcage.
And I believe thin people actually look better than phat dudes in a high rise. A bigger guy with pants hiked up high will look even wider because of the horizontal to vertical dimension ratio of his apparent upper body.. a thin man will look more proportioned. Unless he's got really long legs.