What is the best country to study for a master’s in 2019 then work and live there afterwards?
Student visas are temporary non-immigration visas issued on the condition that foreign students return to their country of citizenship immediately upon completion or termination of full-time studies. Intent to remain beyond the time-purpose of any temporary visa is visa fraud - grounds for visa denial, or revocation with deportation/mandatory departure, and permanent bar to entry. Countries are really cracking down on this backdoor immigration or Scam-Migration. E.g. tens of thousands of Indian student visa applicants are being denied on the grounds of visa fraud, intent to remain. Besides, even with a master's in a STEM occupation, employers these days have so many applicants that they are now only considering those with master's plus at least 3-5 years of experience in some specialization - and they have to get that experience in their own country before applying for a job which might offer prospects of a temporary employment visa. Go to school, go HOME!