Well, then we're even...I never expected to find so many snobs on here.
It's not snobbery. No one is saying you have to wear Armani suits or Prada dresses. A pair of khakis and an oxford shirt are not much more expensive than jeans and a t-shirt. You can get a decent suit for a couple of hundred bucks.
This has nothing to do with money. Rich people can be uncultured snobs while working class people can know exactly what is appropriate in a given situation.