So $10 plus a $3 tip is "paying extra" to you people

Yes. The price is 10. I pay 13. That's 3 more. Simple math.

you're gonna happily pay the same shitty owner $15 "and no more

That's a straw man argument. I probably won't support a shitty owner at any price.

What I want is to know the price up front, without checking for loopholes, adding tips and whatever. I don't care how simple the math is, or how much I love math or how good I am at calculating in my head, or how big the impact is to my personal economy.

I see a price, I either pay it or I don't. There's a reason that anything else is literally illegal where I live.

You're welcome to have your opinion, this is mine.

Again, I don't mind tipping if I actually get extra. I'm a big tipper, if I get more than I'm paying for.

just licking some capitalist footwear under the guise of a kind of false consumerism

Wow, that's American level defense of capitalism. Where I'm from, we pay a lot more attention to consumer rights and employee rights.