Ahh isn’t that sweet, however slightly disappointing BSF, surely your stand up straight backed righteous quest for truth and honour amongst cleaners in the face of so much criticism, doesn’t have a weakness does it? It cant be as simple as "Hi honey" that turns you into a girl thingycat can it! (lol I actually wrote a different word, big brother watch out)
If it is , then aren’t some people gonna have fun with you sweetie

Having made the decision on one occasion of pulling 12 specialist cleaners from a site (without adequate notice) due to none payment and then being dragged through a very rapid legal process because of it, I can tell you its not as simple as you think.
It appears that the law do not favour anyone who would cause deterioration of hygiene, welfare or the environment in general within a work place and especially over money.
As far as they are concerned you as a contractor should have your act together and have mechanism's in place to resolve all issues without bringing about such a situation. In the event that agreement cannot be found, then you must provide an adequate notice period, to enable replacement.
All this of course depends on who has knowledge of the likely outcome should it become legal, and therefore posturing and threats only have any real effect with idiot to idiot and are usually caused by an inadequate contract if any at all.
However the odd bluff still works now and then