The first concern is with respect to the expected scale and role of private sector engagement in infrastructure development. As noted in section B, through history, domestic public financing for infrastructure development has been dominant, and experience suggests that such public sector dominance will continue even if private finance grows in the years ahead. Even today, where private finance exists, it comes in together with public funding. In Africa, domestic public finance accounts for 66 per cent of total infrastructure finance (G20, 2011: 7).