In other words, we don't have to see that a plumber is making money to give him a loan, we can see that he is increasing his assets - shepherding his resources. Our index defines several social assets and will attempt to use existing data to measure changes in them. GDP is more concerned with production and consumption, less concerned with assets - what we have for the future. We can deplete resources by either taking them as an input for manufacture or making them unusable by adding the detritus of consumption. Of these, engagement is the least obvious subcategory of capiutal.
Engagement is the buy in, participation, movtivation, contribution effort of individuals.
It's when we pull together, or act in the interest of the whole. Social and organizational capital is our culture and institutions. It extends our efforts beyond the personal, over time and society. Cultural assets are sometimes thought of as a sense of community. Institutions can encourage access, parity, safety, effectiveness.