Myers doesn't acccept cash, page-11

Cheques being phased out by 2030.
Cash likely to follow with people moving past credit cards to digital wallets on their smart device in ever greater numbers.
Young people still using cash to buy their drugs, though, and plenty of citizens still hoard cash rather than spend it.
Banks closing down branches and actively encouraging retailers to go cashless.

https://www.abc.net.au/news/2023-06-21/cash-almost-gone-australia-in-decade-like-cheques-wholl-miss-it/102501158

Cheques are horrendously expensive to process. The average cost of everything that had to happen to process a cheque exceeds $5 per payment, mostly borne by banks.
Cheques will be phased out by 2030 as the use of mobile wallets sky-rocketsAustralia is set to be a cheque-less society by 2030, if the federal government has its way.
But cash is expensive in its own way. The average cost of creating, sorting and trucking all those sheets of plastic and coins exceeds 50 cents per payment, mostly passed on to banks and retailers, and it is soaring as the number of payments plummets.
As recently as 2007, the vast bulk of consumer payments — 69 per cent — were in cash.
By 2019 only 27 per cent were in cash.
By 2022, after two years of COVID, it was only 13 per cent.
At this rate, it's hard to be certain how long cash will last.

The real expense is in moving notes and coins around, keeping them nearby and restocking banks and cash registers.

Aside from payments the Reserve Bank makes to banks for returning damaged notes, the banks (and, through them, the retailers) are expected to pay for the lot.
Until recently that gave the two firms that dominate the business (Linfox Armaguard, and Prosegur, which owns Chubb Security) a pretty good deal.

Except that the volume of cash they've carried has dived 47 per cent over the past 10 years, 30 per cent of it during COVID.

Both firms say their money-moving arms are incurring "heavy financial losses" and that if they increase their prices much more, retailers might move even further away from cash, pushing their costs even higher.

Last week, the Competition and Consumer Commission allowed them to merge on the condition that they limit their price increases to the consumer index plus 7.5 per cent per year.
That increase is so steep as to suggest a death spiral: the more they charge, the less retailers will use cash, the more they'll have to charge.
The only way out, unless they can make really big efficiencies, or unless the decline in the use of cash stops, would be for the government to return to subsidising the use of cash.

It's hard to see how it could make the case to do that when there are cheaper emerging technologies.