This doesn't appear to be true. Iceland is one of the wealthiest nations on the planet per capita.
Iceland also has the highest median wealth of any country at $413,193 compared to the US median of $107,739. Even in average wealth, Iceland ranks #5 globally only behind Switzerland, Luxembourg, United States, and Hong Kong. Keeping the average and median much closer than those other four does agree with your claim that they're good about making sure everyone has a good life. https://en.wikipedia.org/wiki/List_of_countries_by_wealth_pe...
Interesting thing I learned recently, is that Iceland has the highest rate of millionaires (in USD) of any country at 20% of the adult population. This more than double the 9% of US adult population millionaires. https://www.statista.com/statistics/262687/countries-with-th...