Other states are like this too. US tax revenue is 27.1% of GDP. In NZ it is 32%. France is at 46.2%.
https://en.wikipedia.org/wiki/List_of_sovereign_states_by_tax_revenue_to_GDP_ratio
Back around 2000, the then Labour government of NZ commissioned a study among about 8 different economists to determine what was the optimal tax revenue as % of GDP for maximizing GDP growth. You can buy the results on Amazon for hundreds of dollars, but the gist of the ~8 papers submitted was that the were all fairly close agreement and came in with figures between 17% and 24% of GDP... quite in line with Pharoah actually.
In China it's 17.5% of GDP. Singapore is at 14.1%.
