I have been emphasizing the difference between commercial and government software.
Commercial software goes through constant review. Mine gets reviewed 2-3 times a day by my boss.
Government software on the other hand has no quality control. Consider the Obamacare web site or the just announced USHCN software disaster.
A bunch of scientists with no software training cranking out code, with the only review process being that the output confirms their biases. The error USHCN has uncovered is so blatant, that it obviously has never been through any kind of serious verification.
They were just happy to see a lot of warming, and it didn’t matter that global warming research, climate models, and US domestic policy in Washington were based on their graphs. It wasn’t worth spending two hours doing any verification.