They keep a foot in both countries, so that they can take from each to serve their best interests.  Because they can.  

And how hypocritical of Trudeau to geld small Canadian business owners as he accuses them of taking advantage of long-standing tax breaks (which have served their purpose well as an incentive for taking risks), while casting a blind eye on the Chinese as they advantage of our social services, invest virtually without restriction and blur the lines between tax avoidance and tax evasion.