A useful rule of thumb is that, in the absence of adjustments to tax brackets to allow for bracket creep, for every one percentage point of growth in household income, taxes paid by households will on average increase by about 1.4 percentage points. That's an on-average figure, though. The actual ratio can vary quite a bit.
In the past year, taxes paid by households increased by around 8 per cent, more than double the rate of growth in gross household income of 3½ per cent. So the ratio is more like a bit over two-toone at the moment, rather than 1.4 to one.