A few decades ago Swedish taxes were  so high that after 6 months, every penny ( ore) went to the state...a Swedish doctor that I met would leave the country after 6 months and live in another country working for cash in another business, non medical, for 6 months ....then he would return to work for 6 months.

One suspects that cruise lines, who already prefer Canadian MDs to those of the USA, which will boom as the population ages, will have many more Canadian MDs aboard....a  luxury suite, a natty uniform , good money, visiting many interesting countries and islands...you young ones, look into it...lots of other perks and advantages.