Like you I have different line of thinking. Why should the elderly give more if not all share to the first son when they never do work? Give becuz they are first son biggest? If elderly have such mindset then they cannot fault those not in first son status to think likewise. Their mindset is like everyone must help but if you are first son status don't help also ok becuz I like you more I die give you most if not all the monies. Then others not first son not your children is it? That is why in ancient times, siblings plot against each other to plan to remove the first son so can share the monies isn't it?I have a different line of thinking …
We only live once and to experience this journey called life to its fullest, we have to live in harmony with respect towards one another (especially the elderly) and without any hatred, anger, resentment, etc. The journey comes to an end for everyone and when it ends, we leave behind everything that we craved to acquire during the journey. The earlier we understand this, the better our experience.