This is diametrically opposed to everything the previous governments' had been trying to fight. It's an encouragement to evade taxes and a political move to appease voters and criminals. The annoyance of being refused payments with anything but cash with ridiculous claims such as POS being broken or whatnot, and not producing any receipt will come back for every law-abiding citizen, that will now be at fault for not possessing an "absolute" payment form, with this practice now being encouraged by the government itself, as up until now for the past few years you could simply leave if you were not allowed to pay with a card (thus making tax evasion much more difficult).

I'm reading drivel about privacy in this thread. Nothing was stopping you from paying in paper money. This isn't a move to protect privacy (which the average person forfeits by carrying around always-connected devices anyway, just to mention one).