You need to be careful when dismissing caution about the elderly who have - through whatever means - found themselves living in a valuable property. The following are just as likely:

- a wealthy individual with many properties who can easily afford a few extra hundred quid a month

- someone living just above poverty level in a property in a previously modest area that, thanks to a gentrification, has exploded in value - and would to move out if their tax band was bumped up a bit

We cannot just dismiss the plight of the latter simply because we want to disincentivise the former.

I'd like to add that the vulnerable (including but not limited to - elderly, long-term unemployed, immigrants, disabled) in the UK have already had to deal with cuts in local services as well as periodically being labelled by the government and the press as lazy or pathetic or scroungers. I'd encourage anyone to resist anything that could be used to further victimize or immiserate them - even if it is just in the form of a casual tweet or comment.

Edit: My last paragraph really sounds a little harsh on re-reading. This is because it was meant to be an "as an aside" comment and not accusing Blackstone4 of anything sinister! I'm generally in favour of taxing the rich and powerful.