Hayek and Mises were in total alignment on this point: economic calculation under socialism is impossible. Without a working price system economic coordination is impossible to sustain. Those communist countries were not growing at all. If you look at actual output compared to capitalist nations at the same time there is no comparison. The case of East vs. West Germany is sufficient to demonstrate this case.

In fact the problem that subsidies create in society is a little window into the problem of socialism that exists on a larger scale.

Hayek would probably agree with the sentiment that you expressed though.