I came across this article at money.com. It discusses how the GDP might be an outdated indicator for the health of an economy and offers up the GNNP - Green Net National Product - which includes depreciation on national infrastructure, decreases in natural resources as they are consumed and the impact of environmental policies.
Very interesting and insightful read:
"In today's business reality, where intangible assets have become
increasingly important, cash flow can be a particularly bad indicator
of a company's value. A startup can have no cash flow and yet be
creating a software program of immense value. A company with positive
cash flow can be running itself into the ground as its capital
depreciates. Economies are no different."
Read the full article here.