I think there might be merit to the argument people make more money than their intelligence, or effort, seems to indicate. And the author lays out some basic arguments here:
"But there is a problem with this idea: while wealth distribution follows a power law, the distribution of human skills generally follows a normal distribution that is symmetric about an average value. For example, intelligence, as measured by IQ tests, follows this pattern. Average IQ is 100, but nobody has an IQ of 1,000 or 10,000.
The same is true of effort, as measured by hours worked. Some people work more hours than average and some work less, but nobody works a billion times more hours than anybody else."
However, you don't need the simulation to add to this argument. If anything, the simulation undercuts it because now you point out small errors and end up doubting the whole argument.