"With that in mind I wonder if it might not be better to get to an overall cap by capping the different elements of welfare in a principles-driven way.
"If you have a (tight) cap on Housing Benefit, the main effect of an overall cap is to cap the child benefits (Child Benefit and Child Tax Credit) received by larger families.
"An alternative approach would just be to phase out child benefits for additional children above some point (either 2 or 3 children). The poll above suggests that people would support this. Obviously in an ideal world you would introduce it for new claimants, so that people can plan acordingly"
See the full article on The Daily Telegraph's website