Were you using your NF to maintain those? Or did that happen naturally? Did you somehow have access to all your pop's needs on the world market even though you were an unciv? (Or are the promote and demote factors different for uncivs? It wouldn't surprise me if they were.)
I wasn't paying too much attention to life needs, but generally they sat around "partially fulfilled" for the middle and poor classes.
I used NF to build up bureaucrats in the 3 states I controlled (having annexed Transvaal and Oranje out of the gate), and once i managed to hold roughly 80% admin efficiency, I turned to clergy. I generally didn't lose much, and I was shifting one NF through 3 states. When I was about 30% westernized, I found myself in the UK sphere (constantly building relations whenever possible), and my economy just kept improving. As my economy improved, I first maxed out my administrative slider (Slowly, to maintain a positive income), then my Education slider (again, slowly). After that, I put some into my military slider, then started lowering taxes (I had them maxed out prior to this to maintain a positive economy, but the pay my clergy and bureaucrats got evened it out considering the low tax efficiency). By the time of westernization, I had lowered tax on rich and middle class to nil, while maintaining a token tax on the poor (that also went when I westernized). Now, I'm running a fairly successful laissez-faire economy.