Voters have rewarded politicians for the war on drugs, three-strikes laws, mandatory-minimum sentences, and crackdowns on drunken driving and domestic violence. But the “lock ’em up” sentiment carries with it a significant downside. It is expensive. Very expensive. In the next year, Spokane County voters will hear plenty about that as the debate over a new jail heats up. The current lockup has about 200 more people than it was originally designed to hold, and the county’s overall population is projected to climb by 230,000 in the next 25 years. Meanwhile, the lease for the World War II-era Geiger corrections facility expires in 2013, and the Airport Board has indicated that it doesn’t want to renew it.