This article explains that the Nordic welfare model succeeds by targeting the middle class, not just the poor. They provide services of high enough quality (child care, health care, education, unemployment, disability, retirement) that the private sector can’t compete. Then the middle class voters support the politicians who support the policies, and are willing to pay the taxes necessary to receive the benefits.

Seems simple, but it’s easy for anti-tax corporate and wealthy interests in the United States to prevent this feedback loop from getting established. They just spew propaganda and buy off politicians who are anti-tax and anti-deficit spending, so the government only has resources for limited programs targeting the poor, the middle class resents paying taxes and receiving little in return while having to pay for sub-par private benefits at the same time, and they continue to vote against policies to expand benefits. Breaking this loop would require a gamble on massive deficit spending (kinda sorta being tried now, legitimately during a crisis in my view) and/or constitutional changes/reinterpretation that stop the legalized propaganda and bribery (which would have to be enacted by the politicians who are being bribed, unless judges were to take the lead which seems unlikely).