By: Mark Glennon*   The U.K.’s central bank was reported today to be considering expanding its stress tests to include pensions. Stress tests are done by central banks to gauge systemic threats to a nation’s economy under different scenarios.   Memo to Fed in case you’re considering same for U.S. public pensions (and we know you read WirePoints closely): No need to bother. Calling it “stress” would be looking backward. It would be more like examining a Post Dramatic Stress Disorder victim at the morgue. We already know public pension unfunded liabilities exceed any Wall Street scam ever —