The more breaks to keeps us from doing something we'll und up regreating, the better.
I find it preferable when people are kept in their place with morality that springs from within themselves, such as they will feel bad about themselves when they commit an act that is immoral relative to their own judgment. This way, if the institution imposing fear breaks down, order will still be upheld.
This is the way most seculars, atheists, etc. moralities function.
You say it's not like that by Monotheistic religions?
Yep.
First of all, its not morality by their own judgment, its morality from other peoples judgment who claim to be in contact with a supreme moral authority. This allows the followers to be easily manipulated.
Secondary, throughout the Bible, (and i'm guessing also with the Quran), people are punished somehow when they do bad things. Stoning, castration, imprisonment (deprivation of freedom), going to hell, etc. That seems to be the only thing keeping the followers in line at the time and fear keeps them in the pews today.
And then theres televangelism....
But wait, theres "Good News", if you join the church and contribute a total of $1000 in five easy monthly installments, our clergy will ensure you wont get sent to hell! never mind about that extramarital affair or eatinga all that seafood.....
....it all plays off
fear.