...COVID?
Norwegians are taking more sick leave after the largest mass-disabling event in generations?
And test scores are worse compared to other Scandinavian countries, like Sweden, which famously had very few COVID restrictions?
Must be the oil money
A growing segment of aging people will bring more medical/care expenses, covered by relatively fewer working people. The fairer a social security system is, the more the expenses will change once the population pyramid shifts.