"Future generations" are a red herring, not living, breathing people. So, no I don't give a flip about hypthetical people brought up only in a rhetorical sense. Maybe they will be glad of the choices we made in the present, maybe they won't. We have the means to pay for the government we want, so I don't buy at all the present arrangement is inherently unsustainable for us or them. If a crisis comes, we will either a) make the choices/sacrifices needed to keep what we want b) decide we don't want those things. Its really that simple. The main reason people talk about "future generations" is to win policy arguments in the present.