You can try to fix the analogy up by saying that “human” stands for an individual member of society rather than the whole society, but then the analogy fails because while there are lots of humans, a Martian doesn’t pick an individual human but extends its tentacles over all the humans at once.
Taxpayers are plural. Some of them pay more taxes than others. Some of them would donate to a charity related to education, others wouldn’t.
I covered that: