If I dine out here at say a pub, the price for a steak is $30 AUD and the price of a beer is $5.
The total price I pay is $35 AUD.
This includes tax.
This includes the wage for the staff front and back of house.
And if for some reason I'm feeling like tipping the staff because they went the 'extra mile', I can optionally do so.
This is super confusing in the US (as a visitor) when the price of a meal is advertised as $xx and then you go to pay and it's actually $xx + tax + tip.
If I'm paying a minimum price of $xx + tax + 10% tip, why not just make that the price of the item? It just makes no sense to me!