Not only is IHT a totally flawed tax due to the geographical issues, but it is duplication too. A property has already been subject to tax, both at the time of purchase and every month since.
Every tax is at least a duplication, though. I pay income on money I've already paid corporation tax on. I then pay Fuel/Alcohol/Property/Inheritance/VA tax on money I've already paid both income and corporation tax on. Then there's NI tax of course.
If you're paying a tax that is only a duplicate then you're doing pretty damn well.
Jesus christ, do you actually believe that?
Do I believe that people whose only vested interest is getting elected want to do the most amount they can for the most amount of voters they can? Naturally. People are inherently self serving so a Government's only goal becomes the attainment of more power (vote share) for themselves and people with a similar opinion.
The reality of Government means that any party in power only ends up with one real goal: increasing tax receipts as much as possible so that they can then spend this tax receipt (inefficiently) on the most amount of people in order to get re-elected. Their goal is for as many voters as possible to say "party X is fantastic because they've done Y for me". Therefore the Tories are already trying to get the most amount of tax out of the economy as they can. This is illustrated by the tax to GDP ratio being at about 38% which apart from times of recession/depression is about as high as you're going to extract from our current economy.
This is why when anyone says to me "increase taxes" to spend on x, I laugh. Taxes are already at damn close to a maximum level for the UK economy. If they weren't near maximum then they'd have already been increased in order to pay for something which would make a party look better to the electorate. Every single Tory minister would tax the top 1% another £50b and spend it on the NHS if it were possible - it would be the biggest gain of votes for any party ever at the cost of an inconsequential minority.
Taxing the richest few % is fantastic as you get the maximum amount of money for the minimum amount of offended parties. Do you know the problem though? You can't tax them at a higher level than they already pay; you either tax fewer of them more, or a greater number of them less (the 1% particularly pay the level of tax that they decide is fair and suitable for them).
Likewise the bottom 20% tend to vote in far fewer numbers, so there is a reduced incentive for any party to create policies that take from people who do vote and give to people who don't. An illustration of this is Labour's policy on tuition fee's. The bottom 20% don't tend to go to university so don't benefit from it, but they don't vote so who cares. The taxes from this are supposedly taken from the top 5% but we know they aren't going to take a drop in lifestyle; so consequently they either a) maneuver their taxes so they don't pay anymore; or their companies increase the cost of their goods which is essentially a tax on everyone else.
Scenario a) creates a black hole in finances which has to be paid by someone. Again the middle classes vote so you don't want to piss them off too much so some of it will fall on the non-voting bottom 20% inc young people who also don't vote. Scenario b) taxes the purchasers of goods which is essentially the same as increasing VAT which is seen as a regressive tax.
This is the reason why the only way the poorest will be better off is through private initiatives and private technological advances; because there is a huge disincentive from taking money from voters and giving it to non-voters.