Game of subsidies
The subsidies are higher in Canada, The next sequel will be done in Montreal :-)
Moving all over the world, work long hours get well paid is great when you are young, free and single.
Not so great when You have married, mortgage up you ears and kids in school and kindergarten.
It's the same in most industries. It's a global marked. In Norway the oil companies get flat 78% tax refund on investments, Even the oil is here and not going anywhere, but it has helped infuse massive >$80Bill yearly investments into oil upstream and downstream technologies. Making Norway number one in oil technology in the world despite ridiculously high salaries. Making it hard for us poor sods in other businesses to attract local talent resulting in immigration, relocating or outsourcing.