Over- spending or negligence is not condoned, accepted or even tolerated in Islam. Such ways will have a negative effect on the child regardless of the social status. Men are urged not to be miserly to his children and household, who are their natural heirs in every religion and society. Children are entitled to such an important right. They are even permitted to take moderately from their parent wealth to sustain themselves if the parent declined to give them proper funds for their living.
Children also have the right to be treated equally in terms financial gifts.
None should be preferred over the others. All must be treated fairly and equally. None should be deprived his gift from the parents. Depriving, or banning the right of inheritance, or other financial gifts during the lifetime of the parents or preference of a parent for a child over the other will be considered in accordance to Islam an act of injustice. Injustice will definitely lead to an atmosphere of hatred, anger and dismay amongst the children in one household.