Wealth Tax: Why Are Countries Afraid to Tax the Ultrarich?

The rising disparity in wealth and visible influence of billionaires have spurred demands for fresh taxes targeting the globe’s wealthiest people. While many citizens view taxation as a burden, voters increasingly support levying more on the super-rich, believing they should contribute proportionally to societal needs. One approach is boosting income taxes, but another option involves imposing annual or one-time wealth taxes on assets beyond a specified threshold. Some nations aim to ease pressure on the middle class, address inequality, or balance budgets. Others argue philosophically that excessive wealth, once accumulated, no longer benefits its owners directly.

How wealth is defined varies depending on perspective. Typically, ultra-high-net-worth individuals hold at least $30 million in investable assets, while the superrich surpass $300 million. In the U.S., former Massachusetts governor Mitt Romney highlighted flaws in capital gains tax loopholes. Writing in the New York Times in December 2025, he asserted that solutions to economic challenges must include greater contributions from the wealthiest Americans.

Recent legislative actions reflect this trend. In March 2025, Washington state lawmakers approved a tax on personal income exceeding $1 million, pending the governor’s approval. Similar measures are under consideration elsewhere. These proposals carry weight because the U.S. is the world’s largest economy and hosts the most millionaires and billionaires, per Forbes data.

According to Brian Galle, a taxation expert at UC Berkeley Law School, taxing the superrich is fair, efficient, and can even bolster democracy. He notes that the wealthy often dominate political and economic decisions, which may distort outcomes. However, one major obstacle is how current tax systems operate—most only tax assets when they are sold. This allows the rich to delay payments, choosing when and where to pay.

“Superrich households can afford the luxury of selling only a small portion of their wealth, enabling them to control their tax timing,” Galle remarked.

Alternative strategies include a wealth tax, which sums all assets and applies a rate to the total. Since 1965, 13 OECD nations have implemented such taxes, though only four—Norway, Spain, and Switzerland—currently maintain them. Critics argue these taxes generate minimal revenue and create administrative complexities. Legal challenges further complicate matters. In 1995, Germany’s Constitutional Court deemed its wealth tax unequal, leading to its suspension in 1997. The Netherlands faced a similar fate in 2021, with its Supreme Court ruling the tax violated European property rights and non-discrimination principles.

One challenge of wealth taxes is accurately measuring an individual’s assets. While cash is straightforward, valuing real estate, vehicles, private jets, and investments becomes intricate. Adding art collections or safety deposit contents adds to the difficulty. Annual assessments increase costs and complexity. Research suggests wealth taxes might discourage saving and investing, potentially stifling innovation and entrepreneurship. “A wealth tax could lead to capital flight and wealthy individuals shifting to more favorable jurisdictions,” noted economists Cristina Enache and Alex Mengden from the Tax Foundation.

For example, after a 0.1 percentage point rise in Norway’s wealth tax, high-net-worth residents moved to Switzerland and the UK. This highlights the risk of wealth taxes driving the ultra-rich to tax havens. Despite these hurdles, the debate continues, with advocates pushing for systemic change to address growing inequality and economic imbalances.