The threshold won't stay at £2 million though, will it? This is the pilot and once the precedent has been set, the administrative kinks have been ironed out, and all the political justifications have been rehearsed as to why it is fair/necessary/acceptable to the populace etc etc, it will be rolled out to include properties of lesser value. Just as the Congestion Charge was expanded, so this will be too.
This might not matter to some of you. You may still have no sympathy with those caught up in this, including those families who do exactly as many of you suggest and sell their 'mansion' and move into a properly of a lesser value, only to find a few years down the line that this is now classified as a 'mansion' too. Presumably they are expected to put up and shut up and thank their lucky stars for their undeserved wealth, or stop moaning and down size yet again.
Someone a few pages ago asked why on earth anyone would chose to live in a £2 million house in London when they could have a HUGE property somewhere else in the UK. I often look at the property pages in the Times, or wherever and fantasise about how we could live in a beautiful Georgian house in the middle of Gloucestershire or wherever. Not that our house is worth £2 million, but it would still convert very nicely into something amazing elsewhere. But we can't because DH's job means he has to live close to Central London. He doesn't save lives, or teach your children. But he does an extremely senior and important job and his input benefits most of you through the work he does in a particular area of technology.
Yes, we could choose to re-train and go and be a florist (I think that was the example given a while ago) and go and live in that Georgian pile. But given that DH is in his early 50s and we have a young child, changing jobs in order to go and live elsewhere in the country and prove I'm not sure quite what point, is not really an option. Unless we are also selfish for wanting to maintain and protect his pension.