[vidarh]

It's certainly maintained by that, but Norway has a couple of centuries history of political focus on food security, ever since the British naval blockade of Denmark-Norway during the Napoleonic wars, and then strongly reinforced by the nazi occupation. The strong focus on keeping the rural areas settled also in large part stems from that, though of course it is also self-reinforcing in that people who now benefit from policies designed to do so tend to want it to continue for their own reasons too.

There's a lot of cultural significance of food security, going back to e.g. decades of making primary school children learn about Terje Vigen (Ibsen's epic poem about someone trying to brave the blockade to feed his family), coupled with a lot of cold war thinking that at least up to the end of the 80's saw food security as part national defence during a time where we still had air raid siren tests many times a year in case of Soviet invasion.

While that has certainly softened up since, most Norwegian politicians still grew up with that.