If capitalism is considered synonimous to 'laisser faire', leaving things to the forces of nature, then you can only expect events not exactly favourable to all people. Just like any of nature's ways. You only can expect the law of the jungle.
In many other case where nature goes too wild, we are used to tame it. E.g. the Hooverdam in the Colorado river, the Deltaplan to keep the Netherlands dry, etc. etc.
Why not with capitalism, if it runs out of hand?
The first thing then coming to my mind is the accumulation of capital in case of a successful business.
Now there is nothing much wrong with a successful business. Almost everybody profits from it: the entrepreneur of course, its financers, its employees and its customers, to name a few.
It would be a bad idea to cut off capitalism at this point. But after the entrepreneur has done his job his honestly earned capital starts to accumulate on its own.
At that point it should no longer benefit, or be controlled by, only a small group of people. At that point it should benefit all of the community in stead.
Well how about abolishing inheritance laws?
Honest entrepreneurs, like everyone else, can keep all their earnings as long as they live. But after that it should become the community. Their children - like everyone else - can prove themselves.
(This being the first step. After that let's think of what next. Let's not repeat the tragedies of the twentieth century in name of ideologies.)