That is your distinction because you chose to draw the line around all humans. But who is to say that the line shouldn't be drawn around black-people, or just men, or just Christians?

And no, taxes don't just magically benefit everyone. It's actually the point of them, that they are redistributive.

Who is to say the line should be drawn using discrimination?

Taxes fund the state. The state provides a minimum set of services - law and order, border security, fire safety - to everyone regardless of ability to pay. That others may derive additional state benefits is beside the point. Everyone gets something.