Expectation meant to be something you want yourself or just someone wants you achieve as they think you are capable of doing it, to meet the requirement of certain rank in some random field. Expectations has bias in someway that it shouldn't be, overly having high expectation on someone will only lead to disappointment. People with high self esteem, when they didn't meet their own expectation one day, they will feel depressed over it and someone will choose to end it with their own way and also the worst way, kill yourself.
Nowadays, parents having high expectations to their children as we can see. Children are taught to be understand certain things and rules, for example, they must at least achieve some sort of achievement in school, for getting an A in certain subjects and maybe some coursework. A difference that can be seen is, western families may have difference perspective compared to asian families. For those, who grew up in an asian family, most of you know what is THAT level of expectation.
I, grew up in a typical asian-chinese family. Parents always have expectations on their children, no matter what kind of age it is. A child will be impose on how important is it for you to get yourself a higher rank and good results in exam and school where they just impose it on their children like it is an instinct. From what I know, most of the western family (I said MOST of them) will just encourage their children to do better as they've tried their best, as for asian family (MOST of them again), parents tend to tell you what to do and follow their way of life, because that's the way they live, they want you to be the same as them.
The reason why parents have such expectations from their children, probably due to they themselves are professionals in the level of society, so they want their descendants to follow their footsteps to become 'someone like them'. As for another reason, probably they just want their children to do well so that they can have that crucial criteria to brag with their friends and peers what a genius child I have, I'm so talent to guide and teach to have such a talented children, basically showing off purpose. So that they can earn probably some esteem that doesn't really mean much to the others. Asians don't like the feeling of being a loser, everybody is so damn 'kiasu' (afraid of being a loser).
I hope parents don't expect too much from their children. They have the right to live the life that they prefer, not to be your puppet. Excessive expectations lead to disappointment, don't regret when the thing you really cherish has gone.
Pursuing for abstract feeling of being an upper class doesn't make your life better, trust me.
Parents please parents.