If you decriminalize pot and other nonviolent crimes (prostitution, gambling, etc...) you had best brace yourself for massive price increases from the poultry industry and others like it. Prisoners are a large slave labor force for a few big companies who are using your tax dollars toward prison costs, to subsidize their own payroll expenses.
The government is looking for another new poultry warden right now...
http://jobs.spb.ca.gov/wvpos/more_info.cfm?recno=488817
Don't worry, thanks to citizens united the poultry companies and big pharma can pay whoever they need to keep pot illegal and jails full. Best of all, nobody has to disclose how much they paid or who they paid.
It all goes back to the same root. Free and fair elections.