The Danish welfare model can work in small states, at the state level. Say in Vermont or New Hampshire.
Denmark has 5 million people in a flat land.
You can’t compare it to the whole of the USA.
Why not let one of the Democrat states experiment with it. People who like it an move there, others can move out.
How about the American Model, the one that begins with “We the People?”
Let’s give that one a try.