To be fair this isn't necessarily how socialism/communism works - it's just a good way to get people thinking about the insane disparity between the common person and the 1%.

Under socialism roles that are hard to fill either because they're hard/specialized or just undesirable can be certainly be compensated. It may not be directly monetarily, it could be earlier retirement, more time off, more desirable housing/location, etc.

And more realistically in a milder/earlier form of socialism different jobs could absolutely pay more. Maybe a doctor gets 5x what a grocery store stocker makes. (But housing/healthcare/etc is covered for both) That would still lead to a world exponentially more equitable than the one we live in.