Capitalism in its purest form is a demanding mistress. Those that succeed win big, and the opposite for the losers.
Extrapolating pure capitalism to its theoretical peak efficiency would, in effect, elimiate the concept of "middle class" as being inefficient.
with opportunity comes opportunity cost (risk). seems we're a bit more risk-averse these days.
On the other hand, the commonly referred to "socialist/communist" theorms could be argued as a model of capital inefficiency at the expense of societal progress.
Life is often a compromise. Drink blended rum