The only way this statement is different than how the Federal Reserve works is that Bitcoin is voluntary (You only join the economic model that you desire to participate in) / non privileged (you don't have to be born into certain groups to participate in how the system works), the system parameters (inflation, etc) are not coercible (The US President can't nominate a Federal Reserve Chairperson to bitcoin to favor policy that favors one special interest group).
>creating wealth out of thin air
The Federal Reserve literally creates money out of nothing for the Treasury Department. Due to seigniorage, Fed banks make money on the inflated currency before the last man on the street can.
>doing useless computations at the cost of enormous electricity
The thousands of servers that run FedWire, ACH, VISA, MasterCard Paypal, Venmo, ApplePay and the Cash-transport Trucks, Physical banks, all waste energy preventing people from trying to steal money too.
How is the current monetary policy better?
Relevant reading: Nothing is Cheaper than Proof of Work 04 Aug 2015 http://www.truthcoin.info/blog/pow-cheapest/