Funny subject for an astronomy forum. But I agree with the majority anyway. We are retired and also use cash for budgeting without running a ruler over every spend. Set amount per fortnight from pension. What's left is spending money for the following 2 weeks. Super/savings for bills & holidays. Surprised to hear some ANZ's don't do cash at ATM. Our local one spits out $100's thankfully. Have used self checkouts, but they are a pain when you want $500 or so and it spits out 25x20's

P.S. If we do lose access to cash, I doubt it's totally about control. I've read that 80% of the $100's ever printed generally don't stay in circulation. They are likely squirrelled away by greedy people avoiding assets testing, and getting belted by inflation.