My parents were quite hard up when I was young but a later career change and some shrewd investments mean they are now very comfortable.
Dad often talks about managing IHT. I tell him I hope they live a long and active life and spend it all. They've helped us a lot through practical support e.g. with occasional childcare, have been very generous with things like paying when we go out for dinner, but we haven't had cash gifts from them and have never wanted them.
DH and I and my sister and her DH are comfortable enough now we're middle-aged and there is a certain satisfaction in having earned it ourselves (albeit life would be very different without the support network parents provided).
I don't pretend to understand all the ins and outs but Dad's latest plan is to leave his estate directly to the GC (maybe via a trust?), which is fine in that I don't particularly want or need it, but split between 4 DC they will each receive sufficient to buy a 4 bed detached in our area outright.
On the one hand that sounds marvelous, on the other, I wonder where your sense of achievement comes from if you have a silver spoon to that extent. It also bothers me how their future relationships could be equitable if one partner has brought so much.
I don't think I've explained it very well, but I just have an uncomfortable feeling that it is the last thing they need for future genuine success and happiness. A little leg up when starting out might be nice, but this goes far beyond that.
Children are currently teens, realistically will inherit before they're 30 if he goes ahead with his plan, unless they live to 100+!
Not much I can do about it though 