The only caveat I would offer to the committee for their consideration is that the cost issues are defined by how the program is modelled and designed. For any parliamentary budget officer, even with the best of intentions and expertise, to answer the question, he would probably ask new questions about what your priorities are for how this program might work.
In the case of the green paper, we're talking about a look at the whole gamut of income security programs that exist and an analysis of that. Whether this committee wants to take it to the Parliamentary Budget Officer is beyond my pay scale.