Atheists; what do you base your morals on?

[Esquilax]

Why would church be enough for me? I have to pay taxes. Why shouldn't I expect that society be organized for my benefit, to the degree that I support it?

Because you aren't paying taxes with the expectation that the government configure the world exactly to your liking, nor to the liking of the majority. You're paying for infrastructure.

Consider it like ice cream flavors, if you like: the secular system we have now is the "vanilla" system without embellishment that represents the things that the entire populace would want, not just your specific subsection of it. Your religious beliefs are something additional, like sprinkles, if you really want to labor the metaphor. They're specific to you and to the people who believe like you, and thus it's a cost you've gotta pay yourself.

You pay your taxes, but that doesn't entitle you to dictate government policy. I'd remind you that there are several million other citizens out there who also pay their taxes, and many of them don't believe the same religious stuff you do. Why are your beliefs privileged over theirs, in this regard?