What do you except when most of players play in AR/CE and make much more money? If we force the price to 11, nobody will keep playing Iron Miner and soon there won't be any iron on the market everyone will keep it for himself. Civilian jobs must pay more related to CnR so the server economy keeps going.
The problem is a lot of deeper, the other solution is to add AI trader but that will kill the miner job.
PnS are slightly problematic but restricting the price of iron way below its value, will cause problems on the economy. People will keep their iron for themselves, nobody will work iron miner and there will be shortage, people will actually trading it for money for its real value at the end. Like I will buy 1m iron from you for 11$ but I will send you another 3-4m cash which will cause scams.
We can fix the small problem on PnS even if we don't tweak the whole economy, just by giving more money cut from each PnS fixed vehicle.