I should add, that breaking the pattern in small decisions that affect basically no one will not work. There needs to be a realistic pattern especially in those big decisions that affect a large number of people, because those are the least likely to have a connection between a good action and a good outcome. That's because our morality has evolved for small personal interaction in a tribe-sized community, and will be more likely to lead us astray the bigger our decisions get. This is not an ad-hoc hypothesis, btw. There have been studies on the subject, and the results are unambiguous. When making political decisions, it is far more likely that a decision based exclusively on morality will lead into disaster, and that a decision based on expediency will have at least some benefit.
That depends on what you mean by "our morality." Drawing on Daniel Kahneman's dual process theory of mind in Thinking Fast and Slow, Joshua Greene (link to pdf) distinguishes between two general patterns of judgment in moral thinking: There are characteristically deontological judgments (i.e. "Don't push one guy off a bridge to prevent five people from getting hit by an oncoming trolley! That's wrong!!"), which are rooted in fast, intuitive processes, and characteristically consequentialist judgments (i.e. "Push the guy, because five is more than one"), rooted in slower, deliberate processes.
Greene agrees with the general idea you're gesturing towards, which is that intuitive moral judgments are more likely to lead us astray as situations become larger, more complex and more removed from everyday life, but the idea that moral judgments underwritten by the slower processes aren't actually moral judgments seems to be a mistake. Even at the pretheoretic level, there's more than one way to think morally.
EDIT: Fixed typo.





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