We are not poor, nor are we super-wealthy, but I don't think anyone benefits from the presence of people who threaten, tantrum, jeer, and try to hold the rest of the country to ransom in a variety of ways because they are irritated that their luxury item is going to cost a bit more.
If you think your family would be happier living in another country, go. It's not the terrifying threat you imagine it to be.
Just reminds me of when Cilla Black and Andrew Lloyd-Webber threatened to leave the country if Labour won in 97. They did - and everyone was like, "ok then, see you later, don't let the door hit your arse on the way out."
You're not gracing the rest of us with your presence. If you feel you'd rather emigrate, and there's somewhere that will have you, go. You don't need to announce your departure. You don't have the clout you think you do.
This country is propped up by oligarchs and billionaires. Your "six-figure salary" and "top rate tax bracket" is a joke to these people. So... bye then.