There is a limit on the increase unless a larger increase has been approved by a referendum. No council (yet) has had the guts to say we need all this extra dosh to protect x,y and z specific services and put it to a vote. They might be surprised to find sufficient taxpayers were prepared to find 7%, say, to fund these. Switzerland, parts of the USA and, notably, Paris hold regular referenda without making a huge faff of it, why can;t we? Oh, I know, the COST of it! Always the stock response in this country when democracy and accountability are called for.