what do you expect on salary statistics?

i would like to opine that most of the samples were taken from those who were generously paid but have lots of time to do things like.... responding to salary surveys.

do you think lowly paid workers would spend time on the internet and responding to surveys? or can they really have access to internet at work or at labor camps?

the survey is flawed in the first place, since the statistical distrubution of the samples is not well represented at all level of working populace.