@Bifflepants thank you for your input re NZ. That's really interesting. I just wanted to mention that you said your lockdown was very similar to her UK. However by the sound of it there are actually some quite large differences:
In the UK anyone who genuinely can't work from home is allowed to continue working. The exception is workers employed in places forced to close e.g. some shops, pubs etc. I'm not saying this is right, but it is what is happening. I've done a rough calculation and I'd say that 60% of the residents of my street are going out to work but are not key workers.
Another direct example is my industry. I'm a dog walker. We are allowed to work a usual. I usually enter at least 20 homes a day, drive dogs to have a great adventure in groups of four or five, and then take them home. For me this felt too risky- both to my customers and to me so I've stopped working despite not being eligible for any help. But most of my fellow dog walkers have continued as normal. This is allowed, but IMO a bad call.
Any food retailers are allowed to be open whereas you said it's only supermarkets in NZ. In fact the concept of food retail has been stretched pretty far and the likes of Wilko and The Range are open and packed out according to my SIL.
Again I don't want to say which is right or wrong but I wanted to point this out- in the interests of a fair comparison.