The government’s welfare bill aimed to tighten the eligibility criteria for PIPs, but a backbench rebellion forced a U-turn in the summer, wiping out around £5bn in potential savings. The episode should not be an excuse to slow reform. Last week, the government launched the year-long Timms Review into the health benefits. It should be ambitious in identifying savings. This includes ensuring that entitlements are more accurately graded according to the additional costs individuals face due to their illness, particularly for mental health issues, which have soared since the pandemic.