So - do the US billionaires have enough concentrated wealth to make a difference in US government debt?
I just pulled up the Forbes billionaires list, filtered by US billionaires, and they list 711 people. Their wealth sums to a bit under $5 trillion. You could impose a 100% wealth tax on all net worth exceeding $1 billion and pay off about 15% of the debt in the first year, but then we'd be out of billionaires and would bring in much less in future years.
Seattlecyclone, could you do the math with anyone in the us with more than $100,000,000? I mean, if you can't live on that... /s
Good question. For that we're going to need to look at a different data source. I found a company called Wealth-X that tries to collect such data. They have a
report available with some summary data. They think there were 2,792 global billionaires in 2020, a couple hundred more than Forbes is saying there are now but the number is in the same ballpark.
They estimate a further 60,000 people with net worth between $100-999 million. Those are worldwide numbers. Most of the report is about the "ultra high net worth" cohort (defined as over $30 million), of which about a third are in the US. That ratio holds pretty true on the Forbes billionaire list, so let's assume it also holds true in the $100-999 million cohort. We can then estimate about 20,000 Americans between $100-999 million, with a combined wealth of roughly $5 trillion (again, dividing the global numbers in the report by three). Let each of these folks, plus the billionaires, keep $100 million after tax, and you'd stand to raise about $7-8 trillion the first year, much less after that.
Of course nobody is seriously proposing a 100% wealth tax above any given threshold. The Biden budget is for a 20% tax on unrealized capital gains over the past year for people over $100 million. This isn't a tax on the whole principal, but just the gains over the past year. It's also billed as a "minimum tax," so if the person is paying more than 20% of their unrealized gains anyway in other income taxes, this tax might not affect them. A
Bloomberg article about this proposal cites a prediction that the tax would raise about $0.036 trillion per year in the first decade. It also estimates 20,000 people who would be subject to the tax, agreeing with the Wealth-X numbers.