Whether he saves money or not isn't all that relevant (though of course he does). The point is that it's exactly the same scheme that he berates in public. He has, in the past, criticised people for doing literally the same thing. And he doesn't "employ several people", he employs one - his wife. I don't have a problem with anything he's done, but then I don't call people that do that "rich bastards" that shouldn't be allowed to vote.
Ken won in 2000 without being the official labour candidate. He's got a lot of support for being himself and would probably beat any official labour candidate they stood against him again.
This company sounds a lot more benign than the web of offshore companies tony blair has set up to run his money through tbh