His name, as they say, is Michael Caine. And he's not a happy bunny. The 76-year-old film star has revealed in colourful terms that he has had it, and will leave Britain if taxes get any higher. "The Government has taken tax up to 50 per cent, and if it goes to 51 I will be back in America," he said at the weekend. "We've got 3.5 million layabouts on benefits, and I'm 76, getting up at 6am to go to work to keep them. Let's get everybody back to work so we can save a couple of billion and...