Australia's Treasury expects a significant rise in both productivity and offshoring of work in banking and insurance over the next 15 years.David Gruen, executive director of the macroeconomic group at Treasury projected in a speech on Friday that the banking and insurance sector's share of employment would fall by around one percentage point by 2030, from around five per cent today.On the other hand, Treasury expects employment in the broader services sectors to grow by around 30 per cent to 2030. The projections arise from work by Treasury and the Department of Industry to update modelling of the projected industrial structure of the Australian economy over the next several decades.