NYC Mayor Mamdani's plan to tax the rich is failing as the governor blocked it and high-earners leave. His backup plan, a property tax hike, directly impacts the middle and working classes he promised to protect, a common failure point of socialist policies.

When governments view successful citizens' wealth as their own rightful property, they become predatory. This mindset drives high-net-worth individuals to leave, as seen in 1970s Sweden and modern New York, ironically destroying the very tax base needed for social programs.

Despite voter popularity, broad wealth taxes are historically ineffective. Most OECD countries have abandoned them due to low revenue, administrative complexity, and capital flight. A more practical approach is to focus on targeted reforms like closing the carried interest loophole and taxing capital gains as ordinary income.

A proposed wealth tax in California triggered a significant flight of capital and high-net-worth individuals, even without becoming law. The key factor was the failure of politicians to uniformly condemn the proposal, which was perceived as a threat to fundamental property rights, signaling a hostile business climate.

A cross-cultural study shows that people are more likely to vote for a policy that hurts the rich, even if it also makes the poor's lives worse. This suggests that resentment toward the wealthy can be a stronger motivator in political decision-making than the desire to improve conditions for the poor.

The most effective argument against punitive wealth taxes isn't fairness to the rich, but the negative impact on the poor. When high-earners leave a state, the resulting net revenue loss forces budget cuts that disproportionately affect marginal social welfare programs.

The mere proposal of a wealth tax, even before it passes, inflicts massive fiscal damage. Analysis by the Hoover Institution shows the threat alone led to high-earner exodus and faulty revenue projections, resulting in a net negative financial impact on the state.

The historical record shows that wealth taxes cause capital flight on such a large scale that they ultimately reduce a government's total tax revenue. For example, after France introduced one, 42,000 millionaires left with €200 billion, forcing the government to later abolish the tax.

Threatening to confiscate wealth from the most mobile people incentivizes them to leave. This capital flight has already begun in response to the proposal, proving such policies ultimately reduce the state's long-term tax revenue by driving away the very people they aim to tax.