Sorry, I should have specified I was talking about effective tax, not the slider. Effective tax = tax slider * tax efficiency.
Ah, ok.
Early on first all for nations when you have no real choice anyway. Later on..depending on your situation, your aims and as you like i'd say.
I'd lower them. Militancy and all that jazz. Something between 30 and 50, usually fifty, depends on classes.
I'll probably lower them as my tech starts improving and factories start working.
Thanks for the help!