You are a true believer that perpetually growing spending (wasting) is the only way your idea of economy survives. What a load of BS!
Unfortunately for resource conservation, that's about the gist of it. Modern capitalist economies require growth to survive. Once they go into deflation, investment stops and they fall into a downward spiral that's very difficult to escape (although massive public investment in global war has worked in the past). If you don't believe that deflation knocks out investment, I know some petroleum exploration companies that will eagerly take your money at the value they commanded when crude was still selling at $120/barrel.
If you want stability with a deflating fixed-supply currency like gold or bitcoin, you're going to have to consider a planned economy where production, prices, and wages are managed in fine detail, and hope that nothing unexpected happens to upset the five-year plans. The experience with these isn't very promising, however. Feudalism is another option that seems more acceptable (and maybe even desirable) to libertarians, or at least the ones that think they'll be living in the castle at top of the hill.