I think it would be too harsh for the city: killing a Mafia member and depriving them of the ability to use their special ability. There is logic in this suggestion, but if the penalty isn't 10,000, as it is for a regular murder, it will create an imbalance. The punishment should be that if they don't have the money, it will be deducted from their next turn's "salary."

Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!