What does it work at? Capitalism is excellent at rapidly increasing productive capacity, but it is also excellent at rapidly consolidating control over productive capacity into as few hands as possible. Unless you exclude capitalists from the political process, this inevitably leads to oligarchy and neo-feudalism.

Hot take: the whole (theoretical) concept behind capitalism

As long as super powerful positions are created people will use those positions to entrench and sustain their power, the only solution is democracy, we see this as self evident in politics but it should also be self evident in the workplace. That is the thesis of socialism. Capitalism fails because it ignores human nature.