Well, there are international students studying at (and graduating from) US schools and getting hired by studios like Dreamworks. But yeah, you still have to be good to get hired plus getting the visa. It's cool to see too how much EA is paying it's contractors on an hourly basis. I haven't see data of artists getting paid…
Your logic is a bit half-baked here, you're making conclusions based on completely arbitrary assumptions and subjective views on quality. What if the MS artist who makes 25% extra does the work in half the time? What if he has 10 years more experience? There are countless reasons for pay to vary, to sit and go "well…