The difference between the effective inflation  rate in the lowest and highest income quintiles increased to 2.2 percentage points in October 2022, its highest level since 2006 (Slide 9, left-hand chart). This inflation gap between poorer and richer households is mainly driven by relative price increases for energy and food (Slide 9, right-hand chart).
Monetary policy can do little about such relative price changes. Even tighter monetary policy, leading to lower headline inflation, would not have prevented such uneven effects across households. Only governments have the mandate and tools to address distributional issues.