Government-induced deflation is definitely going to be a transfer of wealth born by one group to assist another. (Also deflation is not the same thing as unemployment, they're just linked events)
A tax reduces someone's ability to consume, so that the government can re-task assets to do something else it wants. We have to be careful to not respond with "oh, be grateful it's not worse". Like, if we didn't pay taxes to fund courts, people's wealth would be lower .... but we still both tax and fund courts.
Debt forgiveness requires that the asset holder lose paper-wealth, or else you're not doing accounting. And everyone who's seeing their prices increase faster than incomes (or anyone who trusted their savings with government-backed bonds and fiat) is seeing a reduction in their ability to consume.
It would be really weird if we didn't conceptually view government-induced inflation as a tax. Like, it's a tax if the government takes away some of your fiat to reduce your consumption, but isn't if they devalue your fiat for some other national purpose? It then allows the conversation to become a pedantic bait-and-switch. Someone pays for the debt-forgiveness, it's impossible not to.
Remember, you can offset inflation by just directly taxing fiat away from people. That's forcing one group to pay for whatever we're trying to make. The opposite of that, not taxing them to control inflation, is forcing someone else to pay. Post-crisis inflation heavily represents the government's inability to tax, so a bait-and-switch is done and I don't think pedantically calling it 'not a tax' is fair.