I might be missing something here, but if you return to New Zealand from overseas with no confirmed evidence of being in close contact with a Covidor (a new term that I invented which means a covid spreader) you have to be quarantined and guarded for 14 days in a hotel; i.e. the Government doesn't trust you!
However, when you are confirmed as a close contact in the community in New Zealand then you are trusted to self isolate. And, if self isolation doesn't work the government is disappointed and the entire city goes into lockdown.
Wouldn't it make sense (and cost far less) to put close contacts of Covidor’s in MIQ? Because when you know they are close contacts and then when invariably it seems covid seeps out further into the community there are no repercussions.
Disclaimer: I'm not an immunologist, doctor, vaccine researcher or a cousin of Ashley's nor have I had covid. I'm not an expert so I will just be ignored. However, I am in a business that loses a lot of money every time we have a level change!