On the other hand I understand the principle that money makes more money (the principle of investment and ROI), and I don't see how "competitive market" tackles this.
It basically feels like the capitalism starts off from fairly-level playing field, but over time becomes more and more unstable, the gap ever-widening. We have already seen it fall (at the beginning of communist regimes), and I'm afraid we'll see it fall again.
That's a pessimist view, which I hope won't turn out to be true, but I'd be interested in exploring alternatives.