I forgot to ad, in the same historical comparison, that the Romans outsourced their sources for cheap and/or free -to be given to the populace- stuff (wheat/grain from Egypt mostly, wine, iron, loomed clothes goods Gauls, wool, tin, copper and loomed clothes from Spain).
That made the things cheaper (workfore in the conolies was inexpensive)
But created heavy issues in case of wars, in particular to ensure the food of the Roman million inhabitant population
We are doing exactly the same thing (at a bigger magnitude) with China and now SEA cheap providers (Bangladesh, Vietnam, Thailand)
Cheap stuff gives the feeling that level of income has not decreased but it is just a feeling : wages have stagnated if not decreased but as you can buy the same amount of stuff than 4-5-10 y ago (even if it is crap) people doesn"t feel that -too much-
But in case of issues with the maritime roads, we are good with big internal problems, much like the Roman themselves experienced it several times