Didn't really strike, as a strike is "unlawful" for government employees. But I took my turn at a 'sick=out' in the Detroit PD back around 1966 or so. There was great peer-pressure to take your turn calling in sick, so it was a no-brainer, really. The ten day sick-out worked, we got a $1,200 raise up to $7,000. That was a great raise, really. And it brought labor peace for well over a decade.