As someone who actually lived in a socialist country (the one that started the whole socialism business :), take it from me. While the original framework devised by Marx in the 19th century referred to means of production, in actuality the socialism that came to pass meant that salaries were set for a given position / seniority with no relation to the person's education or how good of a job they were doing.

Ie that was the socialism as it was practiced 'on the ground' (which was in no small part responsible for why USSR economy collapsed).