NZ isn't currently issuing visas outside of a few categories of "special worker in shortage". (In order to citizens and residents a better chance at getting a quarantine spot.) So this introduces a new special exception for the very wealthy.
In the biggest economic slump since the Great Depression maybe it makes sense to consider rich people who invest lots of money into the economy a "specialized worker" since they might play an important role helping recovery.
And that's fair enough but if there are limited spots they should go to existing NZ citizens/residents, and those with the greatest m=need should be prioritised.