The replies here are crazy. Mom, Pop, and two kids getting hit by McDonald's for $30. You used to be able to get McChickens and Double Cheeseburgers off the dollar menu. I remember it being a lifeline...
There is a Big Mac Inflation Index
You could probably adjust it for changes in median wages
https://www.economist.com/big-mac-index
You could probably adjust it for changes in median wages
https://www.economist.com/big-mac-index
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