Description
Britain's tax debate just got a lot more complicated.
David Reuben, one of Britain's wealthiest businessmen, has moved from London to Monaco, joining his brother Simon. Together, the brothers were ranked second on the 2026 Sunday Times Rich List with a combined fortune of almost £28 billion.
And that raises a much bigger question than:
"Why not just tax billionaires more?"
The real question is:
How much tax does the government actually collect if a wealthy taxpayer leaves the country?
The speaker in this clip models what Reuben's potential UK tax contribution could have been and estimates it could be worth tens of millions of pounds a year.
But that's an estimate — we don't have his personal tax return.
The broader economic point is about the tax base.
Because capital is mobile.
Entrepreneurs are mobile.
Investors are mobile.
And wealthy individuals can potentially change where they live, invest and structure their affairs.
The UK ended the old non-dom regime from April 2025 and moved to a residence-based system, making the tax landscape significantly different for internationally mobile wealthy individuals.
So here's the debate:
If you increase tax rates but some of your highest-tax-paying residents leave, have you actually increased tax revenue?
Or have you increased the rate while shrinking the tax base?
The transcript makes an even bigger claim — that replacing the estimated tax contribution from one individual could require thousands of ordinary taxpayers.
That specific 6,700 figure is a modelled estimate, not an official government statistic.
But it highlights an important question:
Is the goal to have the highest possible tax rate — or the highest sustainable amount of tax actually collected?
Because in a world where wealth and capital can move across borders, tax policy has consequences far beyond the headline rate.
What do you think?
Should governments prioritise higher tax rates on the wealthiest — or focus more heavily on keeping high-value taxpayers and investment in the country?
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