It's good to see senior politicians acknowledge the central role that female employment must play in raising living standards in the next decade. And it's true that improvements can be made by, in the DPM's words, "shaking up rules and arrangements". But just as the coalition is finding on childcare, shuffling the pack can only get you so far. In the long-run, we have to invest more as a country in supporting parents to work, particularly mothers who often find that work doesn't pay. That means putting our money where our mouth is.