Population control plan

We have to realize that with current medical technology, we are living longer and as a consequence the population grows at a rapid rate. My plan to make the population shrink is very simple. What we need to do is release bears, lions, tigers, wolves and prisoners into the streets. All of the above will be able to kill any citizen without risk of going to prison. Everything will be better, these animals will increase in population and humans will decrease in population. As that trend continues there will be less waste and mother nature will be very happy.