alt Hacker NewsDifferences once you break the 0.9 range are more noticeable at the bottom end, particularly in the context of the OP's claim about people in the US "struggling to stay alive". There's also an "inequality weighted" HDI (accessible from your HDR link above by drilling down to the individual country data) which puts the US a fair way behind many of the EU countries the sheer weight of its per capita GDP puts it ahead of (on that index the US is even marginally worse than some of the wealthier Eastern Bloc countries, but interestingly on dead level pegging with France for the last decade)
Even then the US is comparable to France - the only European country that comes even remotely close to America's power projection capabilities - and significantly above Italy, a fellow G7 member and large EU member that also has power projections capabilities.
The only large European countries with a significantly better iHDI are Germany and the UK.
All this does is justify the fact that most EU member states have taken advantage of the peace dividend at the expense of countries that have heavily invested in defense capabilities like the US, France, and Italy which fuels anti-European sentiment that turned into the current diplomatic crisis.