Would you suggest that the iterated interactions between Germany and Greece after the 2008 financial crisis, with Germany's various terms for Greece's financial bailout, were an example of Europeans being more willing to sacrifice for the greater good?
Or how about the current resistance of Eastern Europeans, regarding refugees, after Germany and Merkel volunteered them to sacrifice for certain visions of the greater good?
Or how about Turkey and ... etc etc etc.
America isn't really analogous to individual nations like Finland and Denmark. It's huge - up around 320 or 330 million residents, IIRC.
And a lot of those residents, despite how American mass media tries to frame things, come from very distinct, very fractious subcultures with long histories. See the book Albion's Seed for one version of this argument. And fundamentally, a lot of those groups don't entirely have shared values, nor shared respect for shared experts.
This is kind of my point in highlighting Germany's problems relating to other European countries - the same issue of different local cultures, and different values, comes up.
In America, one of the main ways people dance around these tensions is by letting people express their values via money. If something is important to you, then you'll likely put your resources together to support it. And if you have a lot of other like minded people, you'll maybe find a bunch of other like minded people to support it to, and pool your resources. But won't rise to anything like national technocratic support for whatever it is.
It's one basic way of dealing with actual, serious, difficult pluralism.
And that does mean, in practice, people have a default sense that other people ought to mostly be able to do what they want with their money, which scales up naturally to the wealthy or rich as well.
It's not optimal, but it's not really clear there is any kind of optimal - again, looking at various between-nation destabilizations in Europe when it comes to simply relying on technocratic assumptions about the greater good is probably useful here.