Ironically, capitalism requires both redistribution and concentration of wealth, as profits earned from increased sales of goods and services by businesses can only take place if there are more consumers who can pay for more goods and services.
That confuses me too. I've heard this before, and I keep wondering... do you know what capitalism is?
Capitalism:
an economic and political system in which a country's trade and industry are controlled by private owners, rather than by the state.
Does it require a profit? No. You need a profit in order to survive. True. But Capitalism, in and of itself, does not require profits, nor concentration of wealth, nor redistribution of wealth.
All that is required to have capitalism, is for you to own your own stuff. That's it.
Before this country even had a currency of exchange, we had capitalism. People owned their own labor, and a plot of ground. They owned the trade of wheat and eggs, for other things.
If you wanted to get some eggs, you had to kill wild game, or find other things, to trade the farmer for his products.
And there was no wealth redistribution, unless you count attacking the farmer and stealing his stuff.
As far as wealth concentration, that has nothing to do with capitalism. It has to do with freedom. I could cash out all my stocks, sell off all my stuff, and go blow it all on women, parties and gambling, and consume all of it. I would be broke. That's not a consequence of capitalism, as much as it's a freedom of choices.
Equally, if you save and invest your entire life, you'll end up a millionaire really easy. That's not a consequence of capitalism, as much as it is a freedom of choice to save and invest.
And while its a nice thought that business needs consumers, that's not entirely true. Business can thrive under any system, with or without consumers. Exxon would be just fine without us. They can sell oil international, and they can sell to governments. There were Chinese companies operating for decades before the capitalist reforms of 1978. 63% of the entire population of China lived below the poverty line of $2 a day. Those companies still grew, and still succeeded even while the population lived in object poverty.