I feel like governments worldwide are perennially musing “what if we could know what everyone is doing, all the time?”
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Like it or not, our high-trust society is devolving into a low-trust society as the world opens up. Our defences must evolve -- and the current free-for-all needs to end.
Or must we absolutely must accept eg every Nigerian, Pakistani, Syrian, Afghan, Indian etc who has a fleeting desire emigrate, else our society will collapse?