[michaelt]

  And as an aside, your test for ethics is entirely asinine

To me, "if everyone did X, would the scenario be tenable" sounds like a less fancy way of saying "Act only according to that maxim whereby you can, at the same time, will that it should become a universal law."

That is to say, Kant's Categorical Imperative [1].

If you consider it asinine, I could introduce you to a lot of intelligent people you would think were asinine.

[1] https://en.wikipedia.org/wiki/Categorical_imperative