The Norwegian Govt has been very careful about not treating the oil trust fund as a slush fund to be used when politically expedient - this is quite different to some other (more corrupt) countries.
Prior to the discovery of oil post WW2, Norway was one of the poorest countries in Europe and living memories of this still exist. The general public are aware the hydrocarbons underwater will not last forever and don't wish to waste the money
Wideroe might be worth spending money on if it needed rescuing for PSO purposes but not sure about a bailout for Norwegian when SAS also services the major trunk routes