Just because I worked at the unemployment office doesn’t mean that is the only job I’ve ever had. Most of the rest of my career was in human resources, so I probably have at least as much as experience as you do. And if you are an employer you know that the UI tax is on a sliding scale.
I expect value from an employee on the basis of the entirety of his cost not on the basis of what's left over once the government is done working him over in his gross.