https://mises.org/wire/if-sweden-and-germany-became-us-state...
Now, if you want to talk about Quality of Life, instead of per capita income, I think there's probably a lot more going for the EU - much lower crime, better infrastructure, less absurd politics, more vacation. I'd definitely live in Nice over Minnesota, and I love Minnesota.
There is not less absurd politics in the EU. It's every bit as crazy over there right now. See: Italy, Hungary, the extreme right in the Netherlands, Greece, Poland, Denmark's recent policies on immigrant ghettos, and on and on.
The EU includes a lot of mid-tier countries. Poor people in the US get free healthcare and average welfare benefits that are far higher than the median incomes of all the mid-tier nations in the EU. The OECD better life index has persistently indicated that the US poor live better than the poor in any other nations except for half a dozen or so (such as Canada, Norway, Sweden, Finland). In the US it's primarily the 20% group above the poorest 20%, that do the worst compared to other developed nations - they often make too much money to qualify for free healthcare, their income potential is weak, their education opportunities are weak, they suffer much higher rates of bankruptcy, and they often don't qualify fully for traditional assistance programs (housing or food).
[1] https://www.vox.com/2015/8/27/9217163/america-guns-europe
[1a] http://news.gallup.com/poll/21346/crime-rate-lower-united-st...
Citation needed.
https://en.wikipedia.org/wiki/List_of_largest_consumer_marke...
The businesses that wants to run ads also spend a lot. Its also true for Enterprise Software to some extent. I work for an enterprise software company and despite having had a decade of presence and having been founded in Europe, 70% of our revenue is from USA.
While I don't have numbers to back it up, personally from my experience, I see Americans spending a lot (sometimes more credit than savings itself) compared to other developed nations.