Canada has been at it for quite a while, otherwise the economy would be stagnating. And it has the advantage that it can chose its immigrants based on the market's needs. Compared to other countries, people coming to canada are also highly skilled:
> Over half of recent immigrants have a bachelor's degree or higher [0]
> Recent immigrants were even more likely to have a master's or doctorate degree,
with 16.7% of them holding these graduate degrees in 2016. [0]
> Over half of recent immigrants have a bachelor's degree or higher [0] > Recent immigrants were even more likely to have a master's or doctorate degree, with 16.7% of them holding these graduate degrees in 2016. [0]
[0]: https://www150.statcan.gc.ca/n1/en/daily-quotidien/171129/dq...