What an undignified hissy fit from a privileged investor type who hates the idea of "socialists" taxing him and wasting the money on unworthy people such as the poor, unemployed, sick, elderly, etc. 

Trudeau's biggest problem won't be the petulant threats of the top-5%ers to take their marbles and go home. His problem will be that the era of significant capital gains could end for purely cyclical reasons. He will then have to abandon his vague promise to soothe the middle class and instead increase taxes on their $100k+ salaries.