The fact that you're suggesting a price and T&Cs on the work doesn't mean anybody has to accept them/can't negotiate (unlike "appified gig work", they can direc

The fact that you're suggesting a price and T&Cs on the work doesn't mean anybody has to accept them/can't negotiate (unlike "appified gig work", they can directly contact you to do so), and in your scenario the middleman is "thin", i.e. it just provides communication between labor buyers and sellers. In "appified gig work", the middleman is thick: by design it makes labor a fungible commodity, and sets prices and T&Cs that workers have no choice not to accept if they want any work at all—at most there are a handful of these middlemen in any local market, and the workers are not at all involved in setting their competitive strategies. They don't have any leverage at all unless they want to stop working altogether. A reasonable court will see this business model as what it is: a way to dodge labor laws.