Dar es Salaam, Aug. 5 -- ONCE upon a time in a parched valley, a strange scene unfolded. A single cow stood glistening, plump and proud, her coat shining in the afternoon sun. Around her, the rest of the herd grazed desperately on dry grass, their ribs showing, their heads low.

Villagers often wondered: How could one cow grow so fat while the others starved on the same land? This is the story of Sub-Saharan Africa, a story of Tanzanias economy today.

The region with majority financially excluded population is the one leading the globe on banking profitability! The paradox was recently alluded to by private sector spokesperson during the launch of Vision 2050.

At the heart of this paradox is the banking sector, a splendid performer. Pro...