If the US didn't pay 3-4x the salary for software engineers compared to Canada, I wouldn't be here either. If China paid me more, I'd move in a heartbeat.
Note that during the time they're in a certain country, these experts are most likely paying taxes at the top tax bracket.
>these experts are most likely paying taxes at the top tax bracket.
Who cares. This is a thinly veiled attempt to say that any person's worth in a given society is approximately equal to how much they pay in taxes - which is insane, for a great many reasons.