The methodology of this report is a joke. For example, to come up with the $600 million figure, they say:
"We simulated an increase in productivity growth in the exceptions using industries of just one one-hundredth of its otherwise experienced growth in the three years from 2007 through 2010 – a very conservative estimate of
additional growth."
i.e., they pulled 1% (net) increase in growth out of the air, and then simply calculate the economic benefits of that hypothetical increased growth.
"We simulated an increase in productivity growth in the exceptions using industries of just one one-hundredth of its otherwise experienced growth in the three years from 2007 through 2010 – a very conservative estimate of additional growth."
i.e., they pulled 1% (net) increase in growth out of the air, and then simply calculate the economic benefits of that hypothetical increased growth.
(Per http://www.digital.org.au/media/166)