Although ironically we have never taxed more nor spent more on public services..

The trope about the wealthier people voting Tory is a bit old hat too, although may realign in guture. According to yougov, in the 2019 election the following percentages voted Tory.

Household income
Under 20,000 - 45%
20-40k - 47%
40-70k - 44%
70k+ - 40%

So the two poorer groups were more likely to vote Tory than the two wealthier.

Income has become less and less of a determinant ot voting across the west in recent years.