To think that it is morally good to sacrifice people's well-being for future generations is a fundamental misunderstanding of morality. It is making a moral "something" out of "nothing."

In that sense it is just like, say, a witch doctor that says you must sacrifice your firstborn child to appease the spirits. Or, for that matter, a Pol Pot who claims that people must be sacrificed for some non-existant, unknowable "good." That is specifically why I referenced Pol Pot.

I wanted a non-religious example, but really any religious or non-religious butcher who clamors for human sacrifice based on a false moral imperative would do.