The way I see it, someone earning 50,000pa is quite likely to be 'putting away bewteen 200 and 1,000 per month depending on the life style they chose to lead and their short/medium term intentions (i.e. if they are looking to retire soon they may well decide to put away the max they can) so could well be living on the same net income as someone on 30,000pa who is spending it all.