Not exactly a reasonable comparison
"Bezos [...] would pay [...] six per cent of his worth. The average American pays 14 per cent of their income in taxes."
Those things are not equivalent measures and are pretty hopeless as a comparison.
As an example, my mum bought a house in the 1990 worth £15k. Now it's 10x that. She gets no extra cash out of it, and had no say- or interest- in how house prices change.
You're suggesting that she should be paying an extra £9,000 a year in tax because a house valuation says the materially unchanged house is worth more?
You know what, I'd like to buy your home for $1Mn.
Your home now has a market price of $1Mn. You think 14% is a reasonable rate, so go pay 14% of your asset value every year to the taxman. $140k this year, $140k next year, $140k the year after- forever paying but never actually realising that $1M value.
Or just pay 14% of your income, with the money you save going to a math textbook.