If you move to the USA from the developing world or even Eastern Europe, regardless of what job you do your salary immediately soars above whatever you made in your country of origin. Taxation on many consumer goods is also likely to be lower. (For example, electronics can be expensive elsewhere due to high import duties or VAT.) Of course, cost of living in the USA is also much higher, but nevertheless lots of immigrants feel that they have moved up in life just because of the higher wages and consumeristic lifestyle now available to them.
That would be terrible for anyone living there, as would the environment, and the environment of every country around that country, etc.
Regulation = Civilization, Taxes = Civilization, Safety Net = Civilization
Now that doesn't mean you want a regulatory nightmare, the USA has real problems with license monopolies and city regs in some areas, but you also don't want unrestricted capitalism like the USA has that destroys people, society, and the common environment. Europe has a lot of work to do as well but at least they grasp this fundamental concept. The middle ground between these two is always hard to nail perfectly.
