Here is my new law:

Any measure of economic growth that counts progress as an increase in the total amount of wealth in the country while a large number of people are still unemployed is a faulty measure.

It may be hard to figure out the exact right measure.  It is easier to figure out when a measure is wrong.  I suppose a corollary to the above law would be:

Any measure of economic growth that counts progress as achieving full employment while decreasing everybody’s wealth to the poverty level is a faulty measure.