"Power at its best is love implementing the demands of justice, and justice at its best is power correcting everything that stands against love." MLK
The reason this isn't going to happen in the US: We're 20 years into our war on the poor, during which the overall life expectancy of the US poor has fallen below that of every developed nation. This has been regarded as a non-issue. This is because since the 1980s, Americans were taught to regard the poor as something less than human, therefore undeserving of the most basic human rights (UN's UDHR) of food and shelter. In the process, normal human empathy has been rooted out of our culture. Love doesn't exist without empathy.
As a people, we live in isolated bubbles. We try to find a few people to live in the bubble with us, and that's the best we can do.
I think you are making generalizations talking about the government in abstract versus people's everyday lives. We can only comment on our own and about those around us accurately, really. Not everyone has a war on the poor etc. Even if people were "taught" that way, it does not mean all think that way. People are not all robots. Many people do help others both as individuals and groups. Perhaps if you stopped talking about the "poor" in abstract , and contributed to or found out which organizations helped in your own community, that would be a nice way to help. Even making food donations or volunteering when you can even once in awhile can really make a difference. If everybody just gave up , then we would not have a world.
The US is a very large populated country, so of course people would associate with those who are familiar on a regular basis. Perhaps you are thinking that people in families are busy working and hence possibly do not have as much time to socialize leading to a "detribalization" of sorts? Or perhaps that in some cases ( especially in cities) people might move so that they have more opportunities? Even cities are often broken up into neighborhoods which makes sense.
At any rate , even though political times are crazy now ( for progressives at least) life does not have to be all bad.
IMO, at the core of progressivism is love for our fellow human, the other lifeforms and the planet we all share together. Anyone against progressive politics is against love.