I agree, @ShrikeAttack.
Watching the English is an interesting book which discusses this to an extent. To be honest, criticising others because they seem to flaunt possessions etc is probably showing your own insecurities.
If you struggle financially to buy something like a car, or if you don't want a 4x4 because they are environmentally bad and bloody hard to park in an M & S car park space, then don't buy one and be comfortable in that choice.
But if you want to drive one to portray a certain image, which makes you feel good, and can afford it, then absolutely no problem.
I grew up in an area where you were heavily criticised if you got above your status. Again, this was simply insecurity, and I knew from a young age that I wanted to move away from that environment.
I now live in an area with lots of 4 x 4s, new kitchens and fancy houses, and I bloody love it. People are a lot more secure in themselves, and therefore happy to accept others for who they are, regardless of what they possess.
Oh, and I've had brand new cars on finance, as well as old cars, depending on what I needed at the time. Currently own one 4 year old car, and a 15 year car, both of which we've had from new, neither of which are 4x4 