Isn't that what this whole born-again nonsense is all about? The idea that all the good works of your entire life matters not a whit when it comes to your salvation, but you merely have only to say you "accept Jesus Christ as your personal Lord and Savior" to earn eternal salvation? Doesn't this idea explicitly let them off the hook for being actual good people?
After all, under a regime like this, they don't have to do anything like helping people or other good works—in fact, as it relates to going to heaven, doing that would be a complete waste of time and energy. Instead, they have only to make a claim of being "saved", something which exists in only their minds and can't be checked or verified. Just tell other people they're saved, that's it, and everyone is supposed to believe them and regards them as holy. On its face, that seems like the absolute laziest way anyone has ever come up with sell the idea of earning one's way into heaven.
It seems to me that if someone like Satan were to ever design a false theology to lead an entire nation of people down the road to perdition, it would look exactly like that brand of Christianity.