Why do white collar folks ume construction workers are morons?

I have found the same attitude in alot of white collar people I know. My answer to them has always been that they wouldn't have a house or condo to live in or a office to work out of, no bridges, damns for hydro, subways, streets, or heaven forbid, a place to buy your coffee in the morning. If it wasn't for the construction workers, where would we be? The white collars would be rendered useless. Everything has a balance and a place. You need both to survive.