Kickass
I would rather see an attitude of "holy crap, houses cost fuck loads. We need to find a way to redistribute the wealth, without punishing those who worked hard for 45 years, and whose kids need to earn over 100k a year to even get a starter home."
In fact the two issues are directly linked and the answer is ....rent control!
Rent control would destroy the Buy to Let market, bringing down house prices - literally crashing down, more's the pity, whereas inheritance tax is a much more graduated tax.
With rent control, your children won't have to worry about not having a large cash sum, because property will be far cheaper.
The downside is that ever since the 1980s, the UK economy has become scarily dependant on consumer debt, fuelled by high house prices - like a giant house of cards, if you like. And the housing market could freeze up leaving many in negative equity etc etc etc.
But on the upside, if you take the bottom out of the private rental market, the price of property will fall and it could well produce a building boom. This was certainly the experience the last time fixed caps on maximum private rental were used, between the two first world wars. The UK has a long history of different types of rent controls across the 20thC. indeed as I have said elsewhere on this thread, rent control is the real story behind the biggest growth in the conservatives' beloved property owning democracy - and the reason why a lot of our parents and grandparents were able to get onto the ladder in the first place.
Lots of people on this thread wonder why there is no (or at least not such high) IHT in other parts of Europe. The answer - again - is rent control. The UK is unique in treating our houses as investment assets, rather than homes, and also at finding moral virtue in home owning as opposed to rental (although there is a certain amount of subconscious self-interest at play here, obviously!)
So there is a potential solution - although with 40% of our MPs across all parties now Buy to Let landlords, it will be a struggle to persuade anyone to grasp this particular nettle.