Howcanitbe I'm not sure absolute equality is the aim so much as people having what they have worked for but not getting random large sums by inheritance in addition.
The main thing is that there isn't enough money currently for universal benefits - they are being cut already, and when those who have list child benefit are pensionable age that end of the benefit spectrum will have been cut too - it already has been in that people have to be older and older to start claiming, and it will continue to be as long as cuts affect people 20+ years down the line, making them easier to swallow.
The bitterness about universal benefits for pensioners is due in part to the fact those who are currently still working won't get such generous benefits themselves. That is why all the "but, but - the war!" and "unlike the feckless young, those who are now pensioners are just universally better people who all worked hard, we're all prudent, all did the right thing and (in some indefinable way, as those who did go through hardship didn't do it voluntarily in general) did it for us gets trotted out - to shame anyone who thinks they deserve the same benefits at the same ages and points out that nobody currently under 60 will get those things.
Putting the wealth back in the pot when you die would enable the generations that follow to benefit from the funds coming back around - through the general pot, not just to those who inherit from the "well off pensioners" towards whom the bitterness is directed in the first place.
Not looking for a communist utopia, just a way to level the playing field a bit and importantly put quite a bit back into the coffers to fund those universal benefits about which the thread began. The lowering of house prices and the reduced incentive for cash poor/ property rich older people to cling on in 2 rooms of a crumbling house which would be better sold to release capital to improve that person's life and to release the property to be bought by a family at the period of life where they need a bigger property is also a good thing and would benefit everyone (except those waiting to inherit).