"Conspicuous consumption is the spending of money on and the acquiring of luxury goods and services to publicly display economic power." (from [http://en.wikipedia.org/wiki/Conspicuous_consumption wikipedia]). It is partly driven by the [http://en.wikipedia.org/wiki/Handicap_principle handicap principle].

It is partly driven by the [http://en.wikipedia.org/wiki/Handicap_principle handicap principle]Conspicuous consumption, whithout a social bariar may cause people to buy more then they can pay, and exhuts that matiral resources.