[hencq]

This could still be true though. There are more likely to be outliers in the large group than in the small group. However, there is a lower bound on the number (nobody makes below $0), but no upper bound. So the distribution is likely to be skewed.

So yes, people named Steve would make less money (though this argument might not work as well for people named Jeff, Warren or Bill I guess).

[Grustaf]

I am not sure exactly what your argument is, but it doesn’t sound correct. The differences will be larger in the smaller group, but the expected value for the average pay in a group is independent of its size. That’s why you can use a sample to find out something about a population.