Yeah both Scum teams stole coins from people, but notably that also had the rule that if you went to 0 coins you died which is not the case here. (Some scum began with a lot of coins at once, others had very few)That's my point, I may be mistaken but if I remember correctly last game mafia got tons of coins from townies.
Considering they have a night to kill/steal (assuming the features are the same/similar to last game) unless they got unlucky tonight they'd have an advantage for every auction and we'd be none the wiser who had shit tons of money.
So with that in mind, assuming Tim has done a good job of balancing, it's reasonable to assume the amount of money mafia gain will be less than last game/something similar so they don't end up with 5x every other player.
So it's reasonable to assume that the mafiakill in this game does not have to 100% steal coins, and it causes death. It COULD also be linked to an ability to steal coins from the dead, or they have a separate ability to take coins from the living...
But the point here is that coin loss and death are separate in this version, unlike the original.