Wealth tax is a long-established practice in Germanic Europe. The list of countries that collected it in 1965 is kind of interesting: Austria, Denmark, Finland, Germany, Netherlands, Norway, Sweden, and Switzerland. Most of them eventually abolished it.

It made more sense in the past, when speculative valuations were less common and capital flight was less of an issue. It was collected from wealthy people, who could probably afford to pay. And it served as an additional incentive to invest your wealth productively. But then globalization arrived and made the drawbacks bigger than the benefits.

There is still a wealth tax in Germany which is, in fact, enshrined in its constitution. However, the tax has not been collected since 1997 due to legal issues regarding its calculation. Back then, the constitutional court decided that wealth in the form of properties would have to be taxed more. However, instead of adjusting the calculation, politics instead decided to suspend collecting the tax. Ever since, there have been multiple political initiatives aimed at restarting the collection of the tax, none successful so far, despite a large majority of Germans (70+%) being in favor of collecting the wealth tax.