Another differnce in the American Way may be a stronger belief, compared to other countries, in capitalism.
I do note that Canucks, through their pension/retirement plans are owners of many of these large corporations.
here are a few countries in which the population is growing (data from world bank via google):
(this is not by any means an exclusive list, I just looked at a few countries in the 'western world' at random)
It's true that all these countries also tend to have substantial immigration, but to suggest the USA is somehow unusual in that respect is a little odd.