Wasting your tears crying into your cornflakes because some people stand to inherit and you don't. Life is unfair in many respects and this is just one of them. And yes, it is a lottery as to how/where you come into this world, and guess what - there's f all you can do about it.
I doubt very much that the bank of Mum & Dad want to use their money (however it was earned) to pay for social care of those who probably / possibly have not contributed anywhere near what they have already contributed over their lifetimes. Of course they want it to benefit their own families.
These same super rich already pay for private care throughout their lives, taking some of the burden from the system, and when it comes to elderly care, again paying for themselves. Lots of posters on this thread would like to bleed the rich dry in a race to the bottom. Which is hard luck really, as PPs have said, wealth advisors will show the wealthiest how to avoid paying ridiculous amounts of inheritance tax.
And for what it's worth, no I'm not likely to inherit big, I don't need to, but what will be left behind when DH & I go is sizeable and we'll do everything we can to make sure it's as tax-free as possible. I don't have socialist values and I'm sorry to break it to you but the UK is not a socialist country.