IHT is one of the most progressive taxes there is. Take from those who can afford it and redistribute it to those who can't.
So you pay 40% of everything over around £350K (not sure of exact figure). That's £350K tax-free and then 60% of everything else. I can live with that.
People always say that it's unfair because people have already paid tax on the money etc. Well that's the case for everything: pay income tax, pay again on fuel, council tax, VAT, etc. There are lots of taxes that come out of already taxed income.
Also, this will encourage yet more people to stay in an expensive family home on their own, rather than selling up and freeing up a bigger house for a family. Instead of building thousands of new homes, we should be looking at ways to renovate existing buildings, and encouraging single people who don't need a 5 bedroom house to move to a smaller one. If you can avoid IHT people won't move, but if you had a tax advantage by moving and giving the money away ahead of time people would be more likely to do it.
A fairer solution would have been to keep the existing limits but decrease the % you have to pay in tax.
An inheritance due to increasing house prices is fair game as far as I am concerned. I know that will annoy a lot of you. I'd rather see more efforts put into looking after the elderly, keeping libraries open and ensuring schools are fit for purpose.