Arnold Kling, arguing that mental problems are the main cause of poverty, writes that:
My guess is that a lot of people with poor impulse control would actually like to be less impulsive. That is, if you had a safe, reliable pill that would address their impulsiveness without harmful side effects, many of them would choose to take it.
That's one of the reasons for the ongoing success of religion. Willpower is a scarce resource. Religion is (among other things) a mind-trick that helps to fortify it.