Realist said: Regarding those who are cheering low birth rates as a positive demographic trend; While there may be some positives, in the long run, there are a lot of negatives.
With a low birth rate, the demographic grouping would increasingly skew towards the elderly. More and more retired seniors, drawing on Social Security and Medicare, with fewer young people working to support the seniors. This is particularly troubling for the US as Social Security does not invest its funds for the future, but instead relies on the working young to support the retired old.
And with the world’s most expensive health care system (close to double the per capital cost in other developed countries), increased spending on medical care for the elderly will be increasingly difficult to maintain.
The US has been following Japan in many ways, including fiscal and demographic. If you want to see your future, look at Japan.