Re: Brainwashing campaign
Cash is actually really complicated.
There's the manufacture, which has to be extremely secure (see "Money Heist" on Netflix for a riff on that)
There's transport, again risky and requiring quite extreme security. G4S have decided that isn't profitable - one assumes because customers refuse to pay them when they don't bother to do it, unlike their other businesses.
At the other end, cashing up takes quite a lot of time, and there is the small risk* of theft of the till contents by employees or the public.
Consumers don't see any of that, and don't care.
Contactless is great because it removes all the above, putting almost all the risk on the consumer instead! Hurray!
* Much larger in some less civilised countries, eg the USA.