Making no purchase is always justified as opposed to making any purchase you don't really need.
It's sad to see that most of the technology is driven by consumerism, not science. 

 Human evolution is driven by consumption.
We are not to decide what other people's needs are. 

 Consumption and consumerism are different things. 

 A distinction without a difference. 

 Consumerism is an ideology built on top of consumption and to drive more of it.