养一个犯人一年要花3万到6万.

https://www.marketplace.org/2017/05/19/how-much-does-it-cost-send-someone-prison/

 

 

 

According to the Vera Institute of Justice, incarceration costs an average of more than $31,000 per inmate, per year, nationwide. In some states, it’s as much as $60,000. Taxpayers foot the bill for feeding, housing and securing people in state and federal penitentiaries.