Even being selfish most of our DC would be better off if inheritance were done away with.
If you can leave your DC £300k that privileges them compared to your sister who can leave her DC £500, and to all the people who can leave next to nothing however your DC is still disadvantaged compared to the DC who are left £1 million and more.
Put it all in the pot to pay for better services to those who need them and the DC from middle income families are on a level playing field with the DC of the mega rich (aside from old school tie network stuff).
If you " only" have £10k to leave each DC they'd gain more than they lose by a total removal of inheritance.
Nobody wants to leave their DC nothing if other people are leaving asmuch as they can - it's like an arms race; if nobody was allowed to do it it would be a better world, but as soon as someone has nuclear weapons those without are at a huge disadvantage.
The 100% inheritance tax idea was inresponse to Dido asking how the adult children of well off pensioners would feel if they had nothing to inherit btw - I thought it would be a bloody good idea if instead of means resting everyone's accumulated wealth just went back into the pot at the end of their "turn" - nobody is entitled to a sudden sum of money they have done nothing to earn and that varies wildly from nothing at all to vast sums based on how much wealth somebody else who has died accumulated in life.
The money for universal - or any - benefits has to come from somewhere, dead people don't need it, and I disagree that unprovable or provable claims about what the living think the dead "would have wanted" trump the greater good :o