I don't see any discrimination into those people who don't want to get vaccinated and that's an another part of concern since we aren't talking about business or revenue on here.
About tax then its just actually a thing which should be asked or required upon since we know on how tax do really plays a role on economic development on a certain country.
Gambling business is generating big revenue and its just right that they would be asking more than into those businesses which are lesser in terms of overall revenue.
It seems to me that we are seeing the beginning stages of discrimination against those that do not want to get vaccinated and personally I do not like it, even if I would take the vaccine as soon as it is available in my country I think we should encourage other people to take it but not force them or criticize them, after all it is their bodies and they can do whatever they want with it, however if they do not want to take it then they should still keep all the precautions in place so they avoid getting the virus.
this discrimination with those who dont get vaccinated will probably come if there's no strong social movement to avoid it,
I also think it's a big problem, before the system used security as an excuse to take our privacy, now it goes to a totally new level where health is used as a way to control people