From the linked article “In Sweden, because of extensive tax evasion, the number is harder to calculate.” after which it makes claims on stagnant wealth distribution during a period of 20 years, from the 70’s to the 90’s, having already admitted to only fuzzy data to rely upon.
Either way, 50 (let alone 20) years isn’t a very long time for policy that deals with income to act upon wealth inequalities borne through centuries of inheritance. (See wealth inequality among races:United States)
