He was never higher ranking (didn't get professorship) until the 1989 revolution, AFAICT he was more interested in research (thermodynamics) than career.
During real socialism, academia was often a refuge of smart and freethinking people, if you were able to get there (some didn't for political reasons). It wasn't a highly paid job. And it also was very inefficient. There were completely useless departments, and the department heads were political positions. But some good science got done, without having to toe the party line, and without having to bend metrics and having to publish lots of repeated nonsense.
(I am not advocating that particular system, I think it was worse, but I am pointing out that measurement is not inevitable.)
One result of liberal (capitalist) approach to science is that people get really good at marketing themselves. That's why science in the Eastern Europe often gets bad optics, because that self-promoting aspect of it wasn't as prevalent there.