Good. As the working population stagnates perhaps employers will attach some value to workers. Of course, without an underclass of immigrant labor, prices will rise and the US will have to import more food. And temporary heathcare workers can be brought in to help the aging population. It's good that America's cordial relationships with key trading partners will facilitate the free movement of goods and labor ...
It's not a guarantee that we'll import more food - though that may be a good thing in the long run to help other countries - we could also switch what kinds of food we eat.
Not everything needs manual labor to harvest like strawberries, crops like corn and wheat and others are quite capable of being harvested in bulk by machinery.
Net calories per employee/farmer would be an interesting metric.
Eating only corn and wheat will leave you with nutrient deficiencies. You can be obese and still malnourished if all the veggies you eat are a slice of tomato and lettuce in your burger and half a potato with the same volume of frying oil.
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