Compare with surrendering the sovereignty of a nation.
What does, or might, "sovereignty" mean in practice?
The ability to defend its citizens/subjects against external aggressors sounds like a good starting point. But if the Argentinians become argie again and re-invade the Falklands, we will have to beg the French to lend us their aircraft carrier. Not much sovereignty there
![Sad :(](https://www.eevblog.com/forum/Smileys/default/xsad.gif.pagespeed.ic.L3FGyzQrjB.png)
The ability to keep the electricity flowing is another good starting point. But we are currently begging the French to build a vitally needed nuke reactor, and the Chinese to lend us the money to pay for it. Not much sovereignty there
![Sad :(](https://www.eevblog.com/forum/Smileys/default/xsad.gif.pagespeed.ic.L3FGyzQrjB.png)
And there are many other similar examples which indicate that sovereignty is an outdated concept w.r.t. the UK and many other countries.
So it sounds like "sovereignty" is a
feature not a
benefit - and that its loss has nothing to do with the EU.