So, to answer your rather pointless questions, those on zero-hours contracts are paid anything from zero (duh) to not very much per hour. Mostly minimum wage to not much over. No hours, no pay. That's the principle. You get work, the employer has to abide by the law on hourly pay, like everyone else. What exactly was your point in asking?

The minimum wage was brought in by Labour. The Tories opposed it. Cameron was one of the leading voices. He said unemployment would rocket. It didn't. He was wrong and you are wrong. He supports it now, basically because he has to. Interesting tangential point. In 2010, the rate for Cameron's bogus apprenticeships was £2.50 per hour. Today it's £2.73 per hour. Five years for an extra 23p. Work a 40 hour week on that and you just about scrape a few quid more than jobseekers for being exploited. Welcome to Toribus's Britain.