Marxian exploitation

"Karl Marx claimed that employers exploit workers because they do not give them the full exchange value of the goods and services they produce. However, Marx’s alternative also exploits workers. The formula 'From each according to his ability, to each according to his need,' necessitates Marxian exploitation. A worker whose ability exceeds his need receives less than he produces and is, by Marx’s own definition, exploited."

~ Richard Fulmer, from his post 'Condemning the Profit Motive'