Natural resources(if that's what you mean) are very limited.Why don't you heed to that call and add two to your unit(family) to make, say seven and see how that strains you as their dependants.Thirty years later you'll have Two well educated,well brought up and three "sumbuas".Amplify that to a national look. Magu is more chizi than clever.Ushasikia tz hakuna resources.
Tzs economy is better off in the hands of few well skilled very productive human resource than big but dependant one which ends up the last part of mk254 post above