During the covid19 outbreaks in Australia between 2020-2022
Politicians often drove their own agendas by implementing a law or rule and justifying it by saying "Based on Health Advice". This started with the best of intentions but ended up a little self serving and crazy,
particularly in places like Western Australia where they full on took the piss and you could pretty much say "Based on Health Advice you're
going to jail"!
The public caught onto this and it became common to use this as a sarcastic tag line when making an excuse for getting what you wanted or making someone else suffer. This was called a BHA or "Based on Health Advice"