Earlier quoted context omitted.
China has a gross savings rate of 45-50%. Current gen has saved for their future.
Money is an abstract representation of the labor of others. If there’s no one to labor for you then your currency is just paper.
Of course you can also over build this capital that will never be used, but will need to be paid back (for example a local government pays to build a town that there are no people to fill it with) and the maintenance is too much, but you still have to look after the people who did the building.