Professor Robert MacCulloch: Why has Einstein Medalist Roy Kerr never been Knighted?

 

Why has Einstein Medalist Roy Kerr, the outstanding mathematician from NZ, never been Knighted?

National and Labour and ACT have at various times waxed on about their "vision" of NZ as a high value-added world tech center. What subject is tech based upon? Mathematics. A Chicago mathematician just told me that whereas last decade most of his star students went into banking & finance, now they are going into tech. On that note, why has Roy Kerr, who is based at the University of Canterbury, never been knighted?