Isn't the primary reason to worry becuase our global economy is founded on debt? Debt only works if the future is more valuable than the present by at least the interest rate on the loan writ large across the global economy.
The easiest way to make sure the future is more valuable than the present is to have more people than we have now, more people working, more people generating value, more people consuming etc.
If there are less people then we need to find a different way to make the future more valuable than the present to pay off that debt.
The easiest way to make sure the future is more valuable than the present is to have more people than we have now, more people working, more people generating value, more people consuming etc.
If there are less people then we need to find a different way to make the future more valuable than the present to pay off that debt.