> Why wouldn't they be allowed to unionize? Because businesses go out of business when they can't meet their financial obligations. Or they declare bankruptcy

> Why wouldn't they be allowed to unionize? Because businesses go out of business when they can't meet their financial obligations. Or they declare bankruptcy and restructure the debt. In the meantime, their competitors pick up their slack in the various markets (labor, suppliers, sales). The same mechanisms don't exist when it comes to governments, who, by definition, have certain kinds of non-negotiable monopoly and monopsony powers.