The purpose of that measure is to not tax the amount of money that is necessary for essential needs. While I would favour a measure that would give the value of that money to the woman herself in the form of a reimbursable tax credit, I don't think we should confuse it with old age pensions.
The trouble with increasing the GIS—and I think it was last increased in the 1980s—is that there's a very high tax-back of it, because every dollar that you earn above the old age security reduces the GIS by 50%. That means that the elderly with very low incomes are in fact taxed at a rate of something like 80%. That's why I recommend a supplement to the old age security, especially to reduce the inequality between men and women, to take account of the social contribution that they've made over their lifetime.
For younger women, I would recommend pay equity and job creation—especially the creation of good jobs—other than the kinds of cutbacks we've been having.