Ask your grandpa what his first job paid. Then ask what he learned there. The second answer ages better.

Numbers from decades ago are a curiosity and not much more, because the figure means nothing without the prices that went with it. What somebody learned on a first job is still usable, since being trusted, showing up and being treated badly have not changed much. One answer is trivia and the other transfers.

Ask an older person what their first job taught them rather than what it paid. Then hold the answer up against the job you have now.