Yes for sure things would need to be completely restructured from the current system . I do think its worth discussing and thinking about what those replacement options might be though, at least a little as it is good to gauge how people feel about the subject, a lot of socialist countries have had very conservative views on things like relationships and sexuality after all and is something that needs to be worked on in a lot of international leftist groups. Any actual functional details of how such a system might actually work should really be left to the people that would actually want to do sex work given the option though.