CMV: Without broad international coordination, a billionaire wealth tax is more likely to be economically counterproductive than beneficial
My view is based on the fact that capital and high net worth individuals are increasingly mobile in a global economy.
If a single country introduces a significant annual wealth tax on billionaires, especially one that taxes unrealized gains or large ownership stakes, it creates a strong incentive for those affected to relocate their tax residency or restructure their assets through countries with lower taxes, such as Singapore, Switzerland, or the UAE.
As a result, I think these policies are unlikely to raise as much revenue as supporters expect. While some tax revenue may be collected, it could be offset by reduced investment, a shrinking tax base, and the loss of future jobs and economic activity.
France's former wealth tax is a good example of these challenges. It was criticized for encouraging some wealthy residents to leave the country and was eventually replaced with a much narrower tax. While I don't think France alone settles the debate, I do think it illustrates the broader difficulty of taxing highly mobile wealth in an internationally competitive economy.
For that reason, I don't think a billionaire wealth tax is effective if implemented by one country in isolation. Unless most major economies adopted similar policies, I think it would primarily encourage tax avoidance and capital flight rather than achieve its intended goals.
To change my view, I would need convincing evidence that a country can successfully maintain a broad billionaire wealth tax over the long term without experiencing significant capital flight, reduced investment, or a substantial erosion of its tax base.