Mansion tax kiboshed?

A snippet from David Cameron on BBC Breakfast this morning:

"I think the Mansion tax is a bad idea because people who work hard, who save, who put money into their home, they shouldn't have the government coming after them every year in respect of that."

So what about that yearly mandatory government collection based on the price of your home known as council tax? What about the money the government takes out of saving accounts in respect of tax?

Well those don't count of course, because a) MPs can claim back their council tax and b) how many of Cameron's mates keep their savings abroad and out of the government's reach?