http://gizmodo.com/5813010/how-bad-do-we-really-have-it-bandwidth-caps-around-the-world
The last sentence says it all...
"And here's hoping we never have to move to New Zealand."
The future fibre network may not improve the situation a great deal, we'll just be able to exceed the monthly cap in a few minutes instead of a few hours.
The government has regulated the price so NZ will stand still while the rest of the world moves on.