As ever this is being framed as the government ensuring that rapcious employers are not exploiting the workers - whereas of course it's about squeezing more tax from the same tax base.
Even if it were about workers rights however, there's always an assumption that self-employment is inferior to being employed from the worker's perspective. What about the rights of those workers who want to be self-employed? Exploited by a rapcious government intent on squeezing the lifeblood, both literally and figuratively, out of the UK's workers.