Federal minimum wage in 1965 was $1.25/h, which is $12.69/h today. Looks like Alaska had the highest state minimum at $2.10, $21.32 today. Or were you taking more average rather than minimum wage?
There is a reason median is used here... If you take into account the massive (and constantly growing) income gap, it's obvious that things have gotten worse for the average American.
You've got it backwards, median takes into account income gap better. Mean would be much higher today because of the increasing income gap. That is why I used the median, so that interesting inequality would be less of a factor.