This is what you'd expect, given that households generally try to smooth their consumption through episodes of income volatility. But there's a real question of how long that could continue if income growth stays weak. This clearly has implications for how we think about the risks to our consumption forecasts.
Graph 4  The weakness in incomes goes beyond the downward pressure on wage growth that I've already spoken about. Yes, growth in the wage price index (WPI) has stepped down. But the WPI captures a fixed pool of jobs. It abstracts from compositional change. Average earnings as measured in the national accounts have been even weaker than the WPI (Graph 5).