It will be no surprise to learn that we’re against this:
Professor Andy Summers of the Centre for Analysis of Taxation, which first proposed the policy, said it had been largely made possible by Brexit.
…
Wealthy Britons fleeing the country for low-tax havens face being hit by a 20 per cent charge on their business assets when they leave the UK under plans being drawn up ahead of the budget.
Summers is half of CenTax along with Arun Advani. Their proposal for a 5% weath tax, to be applied retrospectively, one of us described as “Tantamount to theft” when giving evidence to a Commons committee. For it is tantamount to theft.
This social contract thing is really here are the rules if you wish to live here. If you don’t keep to the rules then don’t live here is the easy part. But also within that same concept is that if we change the rules then you’ve the right not to live here. To insist upon rule change but no right of unpunished exit is to switch from government doing as the populace desires to government regarding the populace as a possession to be farmed.
We regard that change in that basic social contract as a vileness, an abomination.
But there is also a more practical issue here. As we’ve said before about tax avoidance - and even tax evasion - people successfully dodging taxes reduces the rate of taxation for everyone else. Yes, we know, most think that if some pay less then everyone else pays more. But that is to assume that there is some set amount that government needs to spend. Which isn’t our view of reality at all. Spending money is fun so politics, government, will do as much of that as it can. Collecting taxes is, a few misanthropes aside, not fun. So the tax that can be collected acts as a brake upon the ambitions of politicians - or these days, bureaucrats - to spend.
That we’ve a deficit shows not all that much of a brake but one all the same. Therefore people changing their behaviour to pay less tax, from just not working as hard all the way through to leaving the country, limits how much the rest of us can be taxed. There really is a Laffer Curve and even the most gurning of politicians realises that going above that peak rate leaves less for those pleasures of the spending. People being able to leave lowers that peak of the Laffer Curve.
Please do note the mobility of the rich is wholly accepted in the standard economics as being a limitation on the ability to tax - lowers that Laffer Curve peak. This is why the Advani/Summers abomination insists upon being retrospective - if it only kicked in next year then all the money would already have left.
An exit tax increases the amount the rest of us can be taxed by limiting that ability to leave the tax system. And anyone who believes that this ability to tax all more would not be used has, we’re afraid, not grasped the reality of politics. Spending your money is fun for politicians. So, if they can do so they will do so - take more of your money to spend that is. We’re thus against those things that enable them to do this.
Plus, you know, an exit tax is an abomination.
Tim Worstall