Just because it's deflationary doesn't mean that it's not spent primarily because you still need electricity, food, gas, and other things. So you are forced to spend it whether you want to or not. Monero itself is not technically deflationary as 0.6 new coins are released every 2 minutes forever. What you end up with is that Inflation asymptotically approaches zero until an equilibrium is reached where new coins are created at the same rate that coins are destroyed through negligence, etc. Right now, Monero has an inflation rate of about 0.85% and falling all the time.