If it's a wealth tax, it is giving the best deal to the people with the most non-cash assets, i.e. the wealthy.
Inflating away your debt only works if you can increase the inflation to be more than what the person you borrowed from thought it would be.
They are at the mercy of the privately-owned Fed who could destroy them.
Erm... no. That's how people imagine it's supposed to work, but in reality, the wealthy fund their consumption from loans using their wealth as collateral, enjoying the benefit of their wealth while avoiding capital gains taxes. Warren Buffet has famously criticized this, it's not some unheard of thing. There are many, many loopholes and they are very much there on purpose.
Take a look at SEC filings, and you’ll see a massive amount of stock sales and capital gains taxes getting paid every day.
One way the wealthy get around this is by taking on debt against their hard assets - generally real estate. As the price of their assets go up, they take out larger and larger loans, each time paying off the old loan and pocketing the difference tax free. The money is devalued faster than the interest rate, so even after paying interest, they are left with free money (our money), tax-free.
Also, capital gains are unearned.
> Also, capital gains are unearned.
On average, capital gains aren't gains at all. They are simply the price of your asset going up, not its value. Housing is a perfect example - it increases in price at the same rate at which the dollar is devalued through supply increase.