Earlier quoted context omitted.
pg once pointed out there may be far fewer startups in a society that does not allow concentration of excessive wealth. That's at least one single valid reason. http://paulgraham.com/inequality.html "People start startups in the hope of becoming much richer than they were before. And if your society tries to prevent anyone from being much richer than anyone else, it will also prevent one person from being much richer…
It would be a much better argument without the strawman of absolute equality.
"This argument applies proportionately. It's not just that if you eliminate economic inequality, you get no startups. To the extent you reduce economic inequality, you decrease the number of startups."