Re: The only news here is the 'NZ' part... Maybe...
Too much data to pass on too-narrow international links and too-small prepaid data allowances. Plus, countries are getting wise to the VPN business and scrambling all unsanctioned ones (read: ones they can't crack). And without the data, you defeated the purpose of the trip (which can be critical for the company; nothing like a lost contract to ruin long-term planning).