Feudal freemarket capitalism won't last much longer in the grand scheme of things... And personally I'd be amazed if the replacement whatever it may be works out worse. But at the same time, I accept it probably won't be an awful lot of fun to live through the migration period.
I wouldn't rule capitalism out entirely, it just gets a bad rap based on the current system which has run mad. (Which is a little like saying "Communism doesn't work, just look at Stalinist Russia") There are other ways, and evolution might be possible.
A rebalancing of reward is needed though, that's plain. And a sane and sustainable approach to growth and consumption- nobody can believe in expansion without end within a closed system.
And the freemarket ideology has proved itself as unsound as it is illogical, there is no invisible hand. And I expect that sooner or later the free market's inclination to self-destruct will outweigh nations' ability to shore things up, if we keep on as we're doing, and that won't be pretty.
It's been proved beyond any argument that the idea of the markets as a shepherd that would look after their own interests and in turn everyone else's was always delusional (and why did anyone ever buy it?) The free market unsurprisingly turns out to be a shepherd that kills the sheep in order to make it easier to shear them, then next year acts surprised when it's run out of wool. Then we give them more sheep because they can't be allowed to fall.
People say "What will replace it"- nobody knew what the effects stock trading and modern finance would have when they first emerged, and yet we ended up with the current world order as a result. None of the past systems of the world were planned in advance. Not knowing what happens next isn't a reason to tolerate what's wrong now and to commit such heroic efforts to supporting a system that isn't just unsustainable, but undesirable. There's no guarantee that we'll build something in its place- but there never was, and here we are.
All of history has been steps towards a better future... Sometimes faltering, sometimes backwards steps, but we can't just stop that process out of fear of what the next step might bring, because even if it proves a wrong one, another will follow it.