If you think previous authoritarian governments were bad, and they were, wait till there really IS a one world government. If there are about 7.6 billion people on earth, if I am not mistaken, they want to reduce the world’s population to about 500 million. What a logistical nightmare that will be for them. Are they planning to ask 7.1 billion people to volunteer for Arkancide?
This is what government-run healthcare is for. Official denial of service to certain individuals or to entire groups subject only to the day's or election cycle's bureaucratic whim or edict.