Really? Are you sure?
The UK disability system is notorious for compliance hurdles. Quite a lot of people including relatives of mine have had claims denied by the bureaucracy, applied for review (which is done by an external judge), and had it reinstated.
It was even worse when the system was outsourced to ATOS.
I've also heard stories about the Norwegian NAV. I don't think this is confined to any one country.
It's not hard to understand. There's constant political budget pressure, and narratives about "scoungers". So the system gets set to default-deny and told to limit the cost of claims by any means necessary.