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I have recently saw an older recording of an economist arguing that he does not know of any "successful implementation" of the solidarity tax. I have searched a little bit about this and found this article which mentions the criticism related to the implementation of this tax in France:

The solidarity tax has been criticized by many who believe it drives away the wealthy from France or incentivizes the rich to find ways to evade taxes.

I am wondering the economist is right.

Question: Has the solidarity tax been successful in any country?

To make the question more answerable (clear, not too broad):

  • successful = the collected amount > estimated loss through wealth being moved outside the country + estimation of tax evasion + cost of collection
  • European country
  • no special context such as warfare, German reunification or similar events
  • after WWII
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    Can you precise what you consider as "solidarity tax" ? Many (most?) taxes include solidarity as one of their justification. Your exemple seem to be the French "Impôt sur la fortune" ("tax on fortune"), which is a tax on rich people assets (and not income), is this what you are interested in ? – Evargalo Sep 6 '19 at 7:17
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    @Alexei: please could you put that in your question. – Steve Melnikoff Sep 6 '19 at 9:07
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    Note that there is already a very successful implicit wealth tax; it's called inflation. Buy property for the value of a million loaves of bread, say a million dollars, wait a few years, sell it for the same value of a million loaves of bread, now worth 1.5 million dollars, and you'll be taxed on the non-existent .5 million capital gains profit you made. – Ray Butterworth Sep 6 '19 at 14:30
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    @Alexei if you want answers instead of comments, I hope you clarify if you mean solidarity tax a la investopedia (like a reconstruction tax in Japan after the 2011 tsunami) or e.g. like that of my native Finland (where it was launched a decade ago to further increase the tax rate of those with high income, on top of the originally strong tax progression) – Tuomo Sep 6 '19 at 15:42
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    I would be surprised if any tax failed your "success" criteria. But that's not usually what people talk about when they talk about "success". If you pass a wealth tax claiming it will raise $100 billion but because of people moving away or employing other tax avoidance strategies the government only gets $5 billion in additional revenue, it would be a huge political failure but would appear to count as a success under your criteria. – Justin Cave Sep 6 '19 at 20:27

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