I am certainly not informed or competent enough on the big figures and secret spreadsheets and books, but I'd still kindly suggest :
1. to cut by a factor TEN or A HUNDRED the size of government and its public "services" FIRST,
2. and, THEN, to see which tax rate remains as deemed necessary (if any)
"Cyril" pronounced "see real". I code stuff.
"To study and not think is a waste. To think and not study is dangerous." -- Confucius