He first argues that foreigners buying property here would pay a fairer tax share under comprehensive capital income taxation on the value of their purchased property.
A lot here would hinge on relative elasticities.
Suppose that foreign demand for NZ property is completely elastic (there are close substitute countries where rich people might go instead) and that domestic property supply is completely inelastic. Under those assumptions, we would see a one-off drop in property values equivalent to the present discounted value of the future tax flow. Some money currently being paid by foreign investors to Kiwi owners would instead go to the government. If demand for NZ property is more elastic than the supply of NZ property, which seems likely, then the proposal mostly transfers money from current owners to the government. And the more elastic the demand for NZ property among foreigners, the more foreign buyers are deterred by the regime.
He goes on to worry about costs imposed by tourists. In some cases, he's right - but in those cases it points to a problem that's broader than tourists. He points to costs imposed by tourists when they have car accidents; if tourists do have disproportionately more accidents, then ACC car registration levies on cars run by car rental agencies should be higher than those on residents' cars - the problem is one of inadequate premium sensitivity to realised risk than one of tourists per se. And while he's right that the system should charge tourists when they wind up needing costly rescue operations from mountaintops or ravines, the system really should charge whenever there's recklessness - whether from tourists or locals.
On the other hand, tourists pay 15% GST on everything they buy here and only can reclaim GST on those goods they bring home with them - if they can be bothered to fill in the paperwork. Further, tourists already pay more for facilities like zoos where locals can often profit by purchasing annual passes that pay for themselves after two or three visits.
And where tourists are cost sensitive, tourist-soaking levies on some facilities will reduce the amount tourists spend elsewhere.
Bigger picture, cities like Wellington do pretty well out of tourists. Sure, they can be a bit annoying for locals when Lambton Quay is jammed if two cruise ships are in port at the same time, but we're able to support a better variety of restaurants and bars than we could without them.
Finally, in a world where public facilities are directed to soak tourists, they need a way of identifying locals. That means we'd all need to show our driver's licence for entry to these facilities. But why stop there? Councils fund a lot of art galleries; you might need to bring your power bill or some other proof of local residence to get discounted admission: a driver's licence wouldn't be enough. Or maybe Councils would start issuing special residents' cards. People who sound local would likely not be bothered to pull out their IDs when entering facilities, but folks like me who still have a Canadian accent after being here for more than a decade would have to stump up every time.
It's that last bit that sounds particularly unappealing. I know Morgan's framing this as being an anti-Winston-Peters thing, but I'd reckon that Morgan's soak-the-tourists proposals have a lot better chance of passing in a world in which New Zealand First has the balance of Parliamentary Power than one in which they don't.
I'd hit on related topics in last week's NZ Initiative "Insights" newsletter.