Yes, there has to be unrest. Promising all sorts of benefits isn't the battle. Those who think they can combine the exorbitant spending of a US system with the social financing of a European system are not serious players in these discussions.
Same for universities. If you want European style public financing of Universities, get ready for a system where universities accept only 1/2 of the students that American universities accept, where a degree lasts only 3 years, and where total spending per student is 50% of the US level even on a GDP basis.
This is the kind of the system that you can get the public to agree to fully fund, and it again requires massive cuts to university staffing, shutting down a lot of schools, as well as lower salaries (on average) of those who remain.
When that starts polling well together with the free tuition part, then you know you have real backing for a European style system.
I'm from Europe and I think European systems are more rational and ultimately much more humane, but they are so far different from what is happening in the U.S. that when I see the college kids argue "why can't we have what they have in Germany/France", I want to yell back "If we had a French system you would have never been accepted to University." People have no idea of whether or not these moves will be popular.
Keep in mind that when European nations adopted universal health systems, the health care sector was a small part of the economy and the nations were politically united with high levels of social trust and solidarity.
When England adopted the National Health Service act in 1946, healthcare was less than 3% of GDP (https://www.nuffieldtrust.org.uk/chart/nhs-spending-as-a-per...) and the nation had high levels of social trust especially trust in government (they just won WW2, large portions of the economy were nationalized, they were used to rationing, etc). Even then it took a big battle, with lots of organizing to get it done.
So when people say "why can't we do what the Europeans did", the Europeans never took over 20% of their economy, they took over ~3% of their economy and that grew to 10%
There is a big difference in the political battle to take 3% versus 20%. Today, in almost every city the hospital is the biggest employer. Healthcare workers are huge political players, and while they certainly favor more government spending, they do not favor more cuts. But taxpayers favor the free stuff, not the "we will tax you more" part. These are huge requirements for social trust and especially trust in government. But now, the U.S. is as divided as never before and social trust, particularly trust in government, is rapidly falling. (source: https://www.pewresearch.org/fact-tank/2019/07/22/key-finding...). The younger generation is in the curious position of demanding more free stuff while also trusting government the least of any generation.
So when all these people say "Hey, free stuff polls really well, we can do this people", I just roll my eyes. This would be 10x the achievement of what the Europeans accomplished and in a nation completely divided and growing farther apart each day.