China's building massive amounts of underused housing. US boomers could have built long-lived buildings and infrastructure (high-speed trains) which provide usefulness to people later in exchange for them paying some money for retirees.
Instead, they built ever-decaying roads and rotting ticky-tacky boxes and left nothing durable for future generations. Hell, they even ripped out trains in cities across the country. (Seattle interurban among so many examples).
China is what the US used to be. Even Charlie Munger said that they are displaying more mercantile behaviour whereas the US is being protectionist and enforcing non-trade based policies across the globe.
Instead, they built ever-decaying roads and rotting ticky-tacky boxes and left nothing durable for future generations. Hell, they even ripped out trains in cities across the country. (Seattle interurban among so many examples).