What is the cost of a cashless society?

So what do you propose instead? Destroy all modern tabulating machines a.k.a. computers just in case they'll get misused by the government?

Then feel free to throw away that supercomputer in your pocket with advanced tracking capabilities into the nearest toilet and flush.

Keeping a healthy democracy and our leaders accountable is far better for everyone than going back to the stone age just in case someone might misuse tech.

And since you brought up Nazis using tabulating machines to abuse Jews, remember that the Nazis were also defeated thanks to computers to break their codes.

The tech arms race is still a thing whether you like it or not and there's no going back. If your government isn't developing advanced snooping, they'll have no issues buying said tools from a country who does (US, Israel, Italy, Sweden, etc.)

I think a cashless society can work perfectly well. There's a single place that I still use cash with because they don't take card (probably avoiding tax) so every time I go there, I come back with change to tip to delivery people when I order food. Everything from my rent to my grocery shopping is done digitally and I honestly think it's great.

However, that's probably because I live in a debit-based country. Debit cards without overdraft capabilities should be readily available even to people with no financial skills because you can't use them to spend more than you earn, making the risk to the banks themselves minimal. The small fee paid for banking services is the only thing at risk and even that won't have much of an impact on the bank in general.

Some countries, most importantly probably the USA, almost exclusively operate on credit cards for digital money, which are practically quick instant loans that you don't want to think about. There's very little in there to limit your credit card spending to your actual income and some people are foolish or desperate enough to borrow money to pay off loans, with credit cards being one of the easiest options. People with poor or no financial skills will run up a debt and quickly stop qualifying for credit, and the end result is that they're dependent on cash or even something as archaic as cheques to transfer money in stores. The extreme impact credit scores can have in the States is mind boggling but it almost looks like people accept some shady third party evaluating their entire life for fraud risk as a normal thing.

If your standard modus operandi is spending money that you'll have to pay back later, I don't think your society can be cashless. Normalise debit cards as standard payment systems and almost everyone can qualify. Frauds will find themselves struggling to get an affordable bank account, but in a modern banking system there are plenty of alternatives available.

Based on this article, Canada clearly needs a banking overhaul for any cashless ambitions to stick without dire consequences.

Were you able before to issue your own currency and start your own regional economy from scratch? Where and when?

>Nothing mentioned was not arguments people have not used.

Unnecessary double negative, and these aren't really arguments so much as rhetorical shortcuts. I'd say, "The buzz-words used are familiar".

Cannibalism? If I imagine ahead to the 2040s - if the world has too many people and resource are scarce, eating people rapidly reduces the footprint while providing needed rations. Further, imagine there's a set of people who are notoriously paranoid, superstitious, sexist, racist white-or-adjacent supremacists, idiots etc. And they are refusing at every turn to reasonably live in the safe, advanced system with the logistics necessary for long term human survival and eventual interstellar flourishing. Instead they are insisting on an archaically wasteful, hard-to-document way of life prone to runaway growth, proliferation and oppression, and we constantly need to quell unrest caused by patently false theories that originate from wherever their communication is able to go on unabated by effective moderation tools. Why is it seriously so wrong to kill them and eat them? All of the moral and religious traditions they hold to are clearly outdated, what if cannibalism was just another outdated principle? Maybe we only need to eat enough of them to make sure they never take over and spread. Eating it can be a helpful sign of loyalty, and a demoralization tool. At some point of evolutionary and transhuman divergence, it might be reasonable to admit they're like monkeys to us - and there are some existing traditional recipes for monkey meat.