People seem to decide for themselves what is 'fair' when it comes to inheritance - a quick look on MN shows the angst about it all. There is a current one where someone says her sister looked after the late mother - did all her shopping for many years, took her in when she needed a home and more, whilst the poster hadn't visited for four years. Mum died and left most of the estate to the sister, and poster is outraged. She was getting short shrift last time I looked, but all the same - how can someone decide that they are entitled to someone else's money?
We will leave our children 50% each, assuming things stay as they are, but reserve the right to change that if circumstances change. If one becomes ill, or has a child who needs care, or who knows what, we might adjust accordingly, but would make that clear at the time it happened. I can honestly say I doubt either would object - both are very independent anyway, and want us to enjoy our lives without looking towards what we might leave behind.
When the subject comes up with friends, it is clear that some are leaving their money between the children and leaving them to pass it on to grandchildren when the time comes. Others are missing the children out and leaving it to the next generation, yet others have split between children and grandchildren, and so on. It gets more complicated where blended families come into play. None are right and none are wrong.
I think people should be grateful for what they get, not resentful of what they don't. I can see that being led to expect something that doesn't materialise will cause disappointment, but at the same time I can see that there are people who would take badly to being told that they weren't going to get what they already see as 'theirs' so I can understand parents not spelling that out.
I would be hurt if my parents left me out of their will - of course I would - but I know that my sister's side of the family will get a much bigger share than mine or my brother's, as she has more children and they have children of their own, and I don't resent that in the least. They are all my mother's descendants after all.