The industry has become more productive; jobs have gone, but sales have not.
Shearer is known to enjoy the surf, so he will understand it is best to ride the waves - not try to turn them back.
Manufacturing jobs that have gone are not coming back and there is nothing he, Graeme Wheeler or King Canute can do about it.
As well as his plan to build slums for the urban poor in areas where there will never be any employment - manufacturing or otherwise - he is granting a platform for the vested interests of the likes of the Manufacturers Association to cry about the exchange rate.
The Manufacturers Association complains a survey conducted by ExportNZ last year showed that, despite grumblings on the issue, only 11 per cent of exporters expected deterioration in sales or employment in the next year, with most expecting both to increase.
When asked what the major barrier to export growth was, only 13 per cent complained of their lack of competitiveness, while 17 per cent mentioned exchange rate volatility.
The losses in manufacturing since 2008 have been more than made up for by new jobs in education and training, health and professional services.
Most of those displaced by the fall in manufacturing will not be rehired in professional services, but we employ fewer typists and lighthouse keepers than we used to.
Cutting the exchange rate will not bring jobs back quickly.
Manufacturing is capital intensive; any upturn in jobs will take many years.
In the meantime, those of us not engaged in the sector would be paying more for imported products such as petrol. Particularly distressing, the cost of upgrading my smartphone would rise.
Manufacturing jobs have been killed because the economic tide has moved.
Shearer knows it, or should know it.
He may be king one day and if he is telling us he can control the tides of economic change, then he is going to look pretty silly on the beach after the next election.
Unless he loses and goes surfing.