David Harvey claimed that the work of financiers shifted to be included in the calculation of national productivity in the 1970s. Previous to this, Harvey claims that finance was excluded from GDP calculations:
"Back in 1970 it (finance) would not have been classified as productive".
This seems to imply that the weakening of Glass Steagall somehow changed this concept. Does anyone have any concrete sources to support the claim that financial activity shifted to be included in GDP calculations in the 1970s? Or are we talking about interest payments and the like as the implied contribution?