If those people expect to continue to live on after they retire, then all the products and services they rely on in that stage of life will be performed by the children of their peers, the ones who had them at enormous personal and financial cost. They are externalizing the costs of there being people to make the economy work in their old age to others so they can take more trips. In fairness, if you don't have kids you should have to pay higher taxes (enormously higher in fact to get close to making up the difference). Those taxes get re-directed to childcare for those that need it. Fair?