I think what many anti-capitalists forget is that you don't need money to have capitalism. If money didn't exist, commodities would be traded instead. Stock dividends could easily be paid in goods or services, for example. All you need is exchange rates, and where there's exchange rates, there's a market you can speculate in. Eliminating capitalism would require some pretty severe restrictions of liberty. Capitalism is but one form of exploitation. There are many other forms.