The idea of communism is that government is your employer and you trust your government to re-distribute product of all labours fairly among all participants. Given that workers unions exist as an adversarial or at the very least opposing power to employers, they are explicitly not allowed in communism because otherwise (in theory) you hurt government's ability to meet its goals for fair redistribution. Another reason they are not allowed is because they can potentially create new workers movement overthrowing present government. Also, things like work hours, overtime, holidays are non-negotiable because now you are supposed to be working for all your comrades, not just yourself. If country happens to have only 1/10th of doctors and if doctors are now need to work 18 hours shifts, that's what they need to do for same pay.
No, that is state capitalism. It is where all communist revolutions seem to get stuck. Seems to be a bit of a fixed point and the idea that you can transition through this to the workers owning the means of production is deeply flawed.
