Democracy has nothing to do with Capitalism. If there was a relation the workplace in Capitalism would be democratic which it isn't by any means.
Capitalism was better than the systems it replaced and somehow it happened organically. It helped the human society advance in many ways. Its major and obvious flaw is that human is not in the centre of it, profit is. Or capital if you like. Money since its birth has the interest and the debt inside it, thus the need for growth it's endless, which except inhuman is also unsustainable. It looks like a cancer really.
Thus in time, Capitalism will be replaced from something better that will serve human society's interests and progress.