If it’s anything like my time on the night shift at a grocery store, there’s probably one person that’s been there for decades and only has to pack out one aisle of pillows, or some other bulky and light stuff, while everyone else has to cover 3 times as many shelves, with smaller and heavier items. But since that person has been there forever, they’re one of the holdouts with a decent contract that makes several times more an hour than anyone else, including the shift supervisor, and actually has decent benefits.
I, too, am far from being either of those things, but it sounds like you could just track purchasing power to get a rough idea. Perhaps I’m misunderstanding it, but it seems to me that, if inflation or other factors have eaten into your purchasing power and you haven’t gotten a corresponding raise to offset it, you can reasonably conclude that the economy is getting worse for you in your personal circumstances.