A few weeks ago the news broke that Hawaii was starting to look at having a state wide Universal Basic Income (UBI). I became aware of the UBI last year when Charles Murray did several short Youtube videos about how UBI would help in the U.S.
I don't know any more of they details for the Hawaii plan but I think this is going the right way and it's why Federalism can work if we just give it a chance. Think of it this way, if Hawaii is successful another state can take the idea and modify it to what works for them. If Hawaii's plan isn't successful there will be lessons that other states can learn from and possibly go ahead with a different plan from the lessons learned. If a subset of states are successful it can me a model for a federal plan.
It's the same idea for the single payer health care. I am not the biggest fan of the of the single payer system but I do think that if a state wants to try a single payer system they should be able give it a try if they would like. (Of course the fact three states have wanted to try but couldn't figure out how to keep their budgets balanced says something)
That states can try these things is the great thing about our federalist system and the exact thing that the Founders wanted them to try. Now that both political parties understand the need to the states to be somewhat independent from the federal government let's see what the states can come up with.