Uhhh yeah you can. There’s also a cafe here in Melbourne that promotes an 18% “man tax” to account for the mythical wage gap.
It’s beyond cancerous
Well that's Australia, I don't know what your laws are there. In the US that is an illegal practice. There are some places where they have tried to do the same thing. In those cases they are either forced legally to stop the practice, or they make the additional cost optional to whatever group they are imposing it on. The additional money they receive for the higher prices, usually directed at white people of men, is typically given to charity. But forcing them to pay a higher price is illegal and businesses here do not get away with doing that.
To be fair, I've also seen this same type of practice being directed at different groups, its not always white people and its not always men. It also usually isn't done by a real business. It's typically a drink stand or something at an event and the purpose for doing it is to raise awareness or like I said above raise more money for charity.
I personally don't like the practice. I think it sounds a lot like eye for an eye. Discriminating against one group because they have discriminated against another just makes more an more discrimination. All it does is create a bigger divide between the groups.
When you say that they promote a man tax, does that mean that men have to pay the additional cost or is it something similar to what I described? I recall reading an article about this and I don't think they were able to actually enforce the additional cost.
If Australian law doesn't protect consumers from that kind of practice, and you feel strongly about it, then you should contact your government and petition a change in laws and then vote accordingly when possible. I don't know much about Australian law so I can't comment further on that.
In any case, in the US it is illegal to charge more for a service in that scenario. I'm not really sure that there is a true equivalency between a man tax and discriminatory hiring practices for example.