There is no causal link between having children and being supported later in life. After children leave home they become fully independent individuals. They haven’t chosen to be born and so they shouldn’t be burdened by the parents. If kids do look after their parents it should be out of choice as it is not their duty to do so. It is government’s responsibility to take care of its citizens, so that the elderly can spend their last years in fair conditions with the possibility to live in decent old people’s homes if necessary.