What do you define as "basic income"?
One thing that's hampering this discussion is innumeracy. I'm using mathematical terms that I assume everyone knows, since I learned them in fourth grade, but apparently not. Six and seven digit CEO salaries don't impact a median. A median isn't an average, that can be altered by the figures at the extremes. It's simply the middle number in a series. Say you have three people and they earn the following per year:
$20,000
$50,000
$100,000
And say you have a second trio who earn:
$20,000
$50,000
$150 million
The median of both groups is $50,000. It simply doesn't matter what that top salary is. All that matters is what the middle of the group is, when calculating the median. The median families I'm talking about are the families that earn more than about 50% of families, and less than the other 50%.
I don't know what "basic income" is. However, I do know what median usual weekly earnings were in 1982. It was about $300. Today, it's $1,001:
https://fred.stlouisfed.org/series/LEU0252881500Q
Even after adjusting for inflation, we're up about 16% from 1982. And, again, that's the "median," so those would be the workers who are right in the middle of the pack -- earning more than half and less than the other half.
The problem with that approach is that different shares of people make minimum wage at different times.
In 1982, 12.8% of workers made minimum wage or less. Now it's just 1.5%. So where minimum wage was what much of the working class actually earned back then, now it's just a tiny fraction of the workforce (mostly just the newest arrivals and people with serious employability problems like not speaking English or having a criminal record):
https://www.statista.com/statistics...ly-rates-at-or-below-minimum-wage-since-1979/
That's why even though the real minimum wage was higher in 1982, so were poverty rates, and first-quintile incomes.
So, yes, to your point, if you were a minimum wage worker in 1982, you'd be better off than a minimum wage worker today. But that's because a minimum wage worker today is in the bottom 1.5%, whereas one in 1982, was only in the bottom 12.8%. So, it's basically a comparison between the very most desperate people today and the whole of the lower-middle class in 1982.