>Those who do not already have lots of capital have almost no access.
explain how the Russian immigrant Sergey Brin had "lots of capital" or how the South African immigrant Elon Musk had "lots of capital".
Yet they are billionaires. So what do we do about this unequal outcome? Turn off people's right to make startups without requiring any capital?
The simple fact is that while Marx wrote in the 19th century when you needed millions to start up a factory, today the cost for starting to create dynastic, millionaire or billionaire wealth is: $0. It has no capital cost. Of any kind. At east, in silicon valley.
what is to keep this from spreading in the future? What is Piketty's response?
In fact there is no such response. There is no way to stop unequal wealth except by taking people's computers away.
You state that you follow my argument but I don't believe you are able to follow it.
Can you agree with this statement please: If owning a purple rock gives people unequal utility (some people get great pleasure out of it while others do not) then if everyone owns a purple rock, people will have unequal purple rock-related utility under this world scenario. Please agree, it's quite specific and formal.
(I realize this is only the proxy argument.)
Now suppose our most important value were equality of outcome. What shall we do? We must measure people's utility, and somehow take from people who get greater utility from purple rocks, enough of their purple rocks, that they end up with the same net utility. So someone who gets huge utility from owning a purple rock might need to be given just a gram, whereas someone who gets almost no utility from it may need to be given a mountain.
Okay, now apply it to money. If someone gets huge capital out of almost capital, do you have to take it all away? If you took away 99.999% of Sergey Brin's capital away when he was founding Google, then today's $50 billion net worth that he has would be $50 billion * 0.001% = $500,000. Unfortunately, that is still too much - it's more than average.
So should he have had 99.9999% taken away, since taking away 99.999% does not lead to an equal outcome?
This is not a theoretical question. It's a practical question you must address. In 2017 there are no capital requirements of any kind that are necessary in order to create billions of dollars, dynastic-level wealth. Zero.
I am afraid you are not following my argument, and that's okay. You are simply wrong that "those who do not already have lots of capital have almost no access." It is similar to saying only a white male can become President. Why would you say that, when it's demonstrably false?
Since you are arguing from false facts, and also don't seem to follow my argument, this is not going to be a productive exchange. Sorry - I tried.