The problem is further exacerbated because the problem will perpetuate. That is why inheritance tax is so important. If anything, I think the level at which it kicks in should be lowered, not raised, although clearly there needs to be a bit more wiggle room to allow the liquidation of assets...
I wonder how many it would apply to if you removed the effects of house price inflation as well? I'm sure it would be a small fraction of even the 6-10%. It would certainly put to bed the "double taxation" argument.
There is regional variation, but it's on the purchase price that the ISA can be put towards. It's £450,000 in London and £250,000 outside.
It's a ludicrously political policy, because it costs relatively little in the short term, with most of the cost falling in 2020 and beyond, and it's more...