In 1964 minimum wage was $1.25.
The last year the govt minted 90% silver coins was 1964.
In that year 5 silver quarters equaled 1 oz of silver or about $1.25
…
What are five 1964 silver quarters worth today?
About $24.00
Minimum wage should be at least $24 if kept up with inflation.
edit: silver quarter value at https://www.coinflation.com/coins/1932-1964-Silver-Washington-Quarter-Value.html