Since 1964 the United States has intoduced cupronickel into coinage, rather than silver. In 1960 the minimum wage was one dollar per hour. This indicates that the minimum wage must be one ounce of silver, as the silver dollar was the common mint when minimum wage was one dollar.
And in 1980 the minimum wage was $3.10 and silver was at $35.
So by your logic the minimum wage now should be $2 per hour.
During the eighties the silver coins disappeared from circulation, which means that the minimum wage has not kept pace with the economy.
And in 50 BC you would get paid 225 denarii a year for being a legionnaire so that's 767 grams of silver a year, so that's $589.12.
We're still doing better with fiat paid wages.
See how stupid it is to pick random dates and claim something?