I don't think it's in one package. The National Council of Welfare did a report on the cost of poverty a few years ago. There are bits and pieces. There's a piece that the London Children's Aid Society did on costs associated with increased children in child welfare. So there are bits and pieces. I haven't seen something that puts it all together.
Evidence of meeting #52 for Status of Women in the 39th Parliament, 1st session. (The original version is on Parliament’s site, as are the minutes.) The winning word was families.
A recording is available from Parliament.