Now, having been there quite a bit, I must say that it really doesn't impress.
The impression I got visiting the US in general (NY, Seattle, San Fran, LA), is that it all seems quite ran down, full of inequality and social problems, and lacking soul, mainly from being so consumerist.
And although I would concievebly earn a lot more working over there, the total cost of living would probably more than make up for that increase. Especially considering having kids.
My friend who is a US citizen with a well-paying engineering job in the LA area, is considering moving back. The work culture is quite hectic, and the amount of trouble they've been through with child care, insurance issues etc are making them reconsider. Not to mention that the area is super-busy and you spend a large portion of your free time in your car.
This obviously doesn't describe the entirety of the United States, but sometimes I wonder if people from the US are aware of living conditions in other western countries. I'm not so sure that the US is coming out on top any longer.