The net inflow to this country of people from overseas is substantially accounted for by the numbers who now come for their education. This success is rightly a cause for self-congratulation. Our ability to compete with other Western providers is testament to the quality of our education. So, what is there to cavil at?
The answer is that it is all a matter of balance. Each institution will have some idea of what is an optimal proportion of foreign students, although opinions will vary. The calculation is not made easier by the tendency of overseas students to focus on particular disciplines, such as business management, so what might seem to be an acceptable proportion for the institution as a whole might conceal a concentration of foreign students in a few areas.
A class that has a high proportion of students from overseas, particularly those for whom English is a second language, may not serve the interests of domestic students as well as it should - and the overseas students themselves may feel it is not quite the New Zealand education they had bargained for.
And the institutions themselves may find there is a downside. There are considerable costs involved in attracting foreign students and in looking after them properly while they are here - marketing overseas, paying commissions to agents, providing appropriate facilities, accommodation and support all mean the fee will often be substantially offset by those outlays.
There is also a world of difference between treating overseas fee income as a useful supplement for discretionary purposes that might not otherwise be afforded, and the situation most tertiary institutions now find themselves in - that is, increasingly reliant on that income to keep their heads above water.
The truth is that our tertiary institutions have, by international standards, been underfunded for many years - and the sinking lid is still being applied year after year. In typically Kiwi fashion, we expect outcomes of international standard to be produced from funding that is only two-thirds or - in some cases - only half of that provided overseas.
That disparity is bound to tell eventually - and once it becomes apparent, it will inevitably reduce the attraction of a New Zealand education in overseas markets.
Looked at in that light, our income from foreign students is better regarded as a sticking plaster or as a life belt - a cry for help, rather than a badge of success. It represents another casualty in the drive to cut public spending at any cost - requiring our tertiary institutions to see themselves as commercial and trading operations, with a year-to-year time horizon, rather than as focusing primarily on providing the best education for the communities they serve.