And yet Wellington's food carts are not run off their feet with business. There are plenty of food carts around because you get quite a gathering of them at the Harbourside Market on a Sunday. And there are about 8 cafes/bars between the Bluebridge and Hikitia.

Yup. And the ones that are out are often on short-hours or not on some good days; when I've asked about it, they've said they don't get enough turnover to make it worthwhile. But ChCh has tons of restaurants around. What makes food carts more viable there?