So, the rest of this comment makes a very dense argument, first using a proxy argument and then switching in the actual argument. The proxy argument is correct but probably you don't like reading it. So just get through it like bitter medicine.
So. Proxy argument. True statement:
Computers are inherently unegalitarian because smarter people get more utility out of them. You simply cannot give the same amount of utility to a dumber and a smarter person at the same capital cost.
So far you might be thinking "Huh? You're saying smarter people get more pleasure out of reading so the Internet is unequal? What the hell... Anyone can read, who cares if some people get more pleasure out of it and others less?"
But the problem is that nearly the same argument applies to startups and creating wealth. Instead of utility (personal pleasure from the Internet), you are now discussing "access to the wheels of capitalism".
Musk slept at the office and shared a computer. Sergey Brin is a Ukrainian immigrant.
The reason these people have unequal results is because computers are inherently not egalitarian: smart people just get more out of them.
You can't stop it, any more than you can stop smart people from getting more pleasure from reading. Can't be done. sorry.
Here is a question Piketty didn't ask: what percent of dynastic, billionaire wealth was created in a single generation in America?
Not addressed at all.
[EDIT: removed reference to more information than is contained here. This comment contains all of the information to understand my point.]