You're right, the origin of this thread was making an argument about all taxes on capital, not just capital gains. I missed that, I guess because nobody mentioned wealth taxes specifically and it's fairly rare for taxes on capital to mean anything other than capital gains tax. Mea culpa.
> The startup wealth tax problem has another solution: allow payment in non-voting startup shares, instead of liquid cash
This is an excellent idea! Did you come up with this yourself or have you heard of others proposing it?
I came up with it myself. It's possible there's prior art but nothing that I've read personally.
I don't think it's a particularly revolutionary idea because sovereign wealth funds already exist. Improving productivity means using less labor which means lower income tax revenues as time goes on (and that's what you want - higher productivity, fewer labor inputs).
And yet, the government needs revenue. What's growing? Wealth. Liquidating wealth to pay taxes is problematic. Hence the sovereign wealth fund. You can apply this to most forms of wealth - even publicly traded stock, real estate, crypto, and artwork.
I've proposed it on this site several times in the past.
Why does it matter whether the value of the shares is observable every day, like a public stock? The value of the shares is quite defined at the time the tax is due. We know this because the government has a specific number in mind for valuation for tax purposes.
The shares are illiquid and that poses a problem for the taxpayer because the government only accepts cash. If instead they could sign over an equivalent number of shares then morally (and arithmetically), they've paid what they owed.
The government may subsequently choose to dispose of the shares on a secondary market, if one is available. Or it may hold on to the shares until there's a liquid, public market for them. Or it may never sell. It all depends on how the sovereign wealth fund is managed and structured. Way smarter and more knowledgeable people than me would have to design how the fund actually works and prevent market manipulation and insider trading.
Sure, but that doesn't stop them being taxed under whatever their most recent valuation was under a wealth tax. Just not taxing non-liquid assets would also be an improvement.
> The startup wealth tax problem has another solution: allow payment in non-voting startup shares, instead of liquid cash
This is an excellent idea! Did you come up with this yourself or have you heard of others proposing it?