Having spent five summers working as a "sanitary engineer" both installing and cleaning "standard" septic systems, the vilest of inventions, I must add my two pence.
I've used the humanure bucket system for the last fifteen years with great joy,even with groups of up to two hundred fifty. The ease of cleaning and maintaining them is a snap.
We have to start taking personal responsibility for our own sh*t, and stop passing the buck to others.
Remember where spiritual beings on a physical journey. :^) Cheers