You'll see a lot of empty claims that the US has practically no social safety net. That's plainly false. That it's not as good/effective as eg France, Sweden, Denmark, Norway, etc., that much is true. Poor Americans get free healthcare, around just over 1/4 of all Americans receive free healthcare. ~24% of Americans are receiving Medicaid.
The US spends more on its social welfare programs, as a share of GDP, than Canada does, and it matches what Australia and Switzerland are spending. The US is close to the OECD middle and a bit behind the UK (OECD figures below):
https://i.imgur.com/5GnDdTp.png
And when it comes to improvements in poverty thanks to our vastly expanded social safety net, you can see that very strikingly represented when you drop out those programs from the calculations (childhood poverty shown below, with and without government aid):
https://i.imgur.com/hqTS3Ck.png
https://i.imgur.com/9aEi2sL.png
The same thing shows up in our homelessness improvement figures from the past 20 years. The housing first program implemented by the Bush Administration and sustained by the Obama Administration - aka a government program - was almost solely responsible for the huge decrease in US homelessness.
The US social safety net has expanded rather massively in the past 40 years. Structurally the biggest problem the US has when it comes to its social safety net, is it's all haphazard and often poorly administered. The US isn't very good at running social safety nets, it's chaotic and critical parts of it are managed in very different ways state to state. We're not getting enough bang for our buck on that spending, we need to do better. We're spending a lot of money and the results are often not good enough (which we frequently see with government spending in the US). For example, if the US were spending per capita on our healthcare system what the UK is, we could nearly double - maybe up to 40%-45% - the number of people we're covering with free healthcare at minimal additional cost.