The ENTIRE CONCEPT of (Marxian) socialism is that labor is the most important thing humans do---therefore it should NEVER be alienated from those who do it.
: If that were true, why would Marxists hate guys like Gates and Jobs et al. so much?
Because Gates and Jobs make millions BECAUSE those who do their work FOR THEM make less than what they are worth.
: Surely the message of Marx is that if you do work to your potential you will be penalized for it.
Nonsense. Ever heard of 'From each according to their ability, to each according to their work'?
: Besides, Red Deathy is with me on this one.
RD was stating that a rational, planned economy that produced for people's NEEDS instead of PROFITS would permit humanity more leisure time. The insinuation that such a state of affairs would lead humanity to laziness is your own (erroneous) interpretation.