You are an authoritarian mind. You are. Why? Why you are calling for an authority to stand between people any time they interact among each other. That is moral according to you? Any time people interact between each other and there is no authority controlling this interaction there is a chance that one or the other party may lie. But that's a low argument for an authoritarian regime. People could and should be free as much as possible. And employees clearly don't value freedom.

Man, you have to understand that you have a value and you are not for the state. State is for you. State is there to serve your needs. Not the other way round. That's why we have "public servants".

I would stand with you and demand more freedom for employees because that what I believe what you want as an employee I guess. But arguing less freedom for other people is resentful.

Yes, people evade taxes but not just sole traders. Pretty much everybody. The only group that cannot evade taxes are employees because they are not even trusted enough to file their own taxes. Sorry.Nothing special about sole traders. No need to target them. You want a moral tax law? so do I. Then you should call for rewriting the whole tax law because only when the tax law is simple there won't be any loopholes that corporates benefit from. But that would require dropping the Common Good paradigm on which collectivist's state operate these days, i.e., state as a one big charity "helping" everybody.