The rich world could shepherd the global economy towards that ideal outcome by allowing lots more immigration from poorer places. Immigration would enable richer places to 'export' their strong social capital to poorer places (by bringing large shares of the populations of poorer places into countries where strong social capital dominates). That would naturally deepen social and financial capital per human worker. Global savings could also be mobilized to invest in additional infrastructure in the rich countries accepting new workers. The appetite for safe, rich-country government debt is nearly insatiable.