It depends on what you consider capitalism.
Suppose you would take the system we have today, put all the stock of every company in a big fund and give everyone equal voting rights in, and profits from, the fund.
That would be a very anarcho-communist world. All economic power would be with the people, not the state, evenly divided, so no one would be richer than anyone else.
But others would call it capitalism because it would be the exact same system we have today.
No it would not be even close to being equivalent to gov+dd, because the government and fund would be totally separate power structures.
You could modify the scheme so that dividends and profits only go to retirees, which would make it a giant retirement fund.
Some people argue China is capitalist and others argue it is socialist or communist.
Truth is, these are all 19th century debates on archaic terms. Every developed country today has a mixed-mode economy with some form of capitalism combined with some form of communism.
It’s more fruitful to discuss how we harness the power of each system in a way that benefited humanity.