The problem with wireless charging is technical and not economic.
The amount of money necessary to buy the electrical juice necessary for something like that is trivial. An iPhone6 uses a little less than 50 cents (U.S.) of electricity per year (about 1 U.S. cent of electricity per phone per week). If people just charged cell phones and there were 5,000 people in your little town, the electricity cost of providing free phone charging to everyone in the town would be about $200 a month. You could finance this program by having local school kids recycle can or look under seat cushions in public places for loose change. Hell, it is common right now to let people charge their electric cars for free in public parking lots.
The problem is that when you are transmitting energy through the air, the highly energetic EM fields are likely to be harmful to you, unlike a radio wave which is so low powered that it is hardly more harmful than background radiation. Essentially, a wireless recharging connection is like shooting a high powered laser beam or high powered X-ray (or gamma ray) from the wireless charging source to your device in more or less a straight line. At a minimum this would drastically increase cancer risks for everyone in the vicinity. In a worst case scenario, people would get painfully zapped and it might start fires as well. Wires have insulation for a reason, and you can't insulate the wireless transfer of power associated with a more than de minimus range wireless charger.
Usually, today, wireless chargers rely on induction of fields between two objects that are basically touching, so there is no danger zone between them that can hurt the users.