Why? Look at opening picture + apply = "We don't want THAT shit to happen..."
...and on that "only money" bit being server side: Movement speed is server sided now too thanks to that speed hack debacle from 2 years back, remember? They also server side checks on player altitude, collision/location validity, some weapon dmg (OPKs getting auto banned in the past), etc etc...none of which directly have anything to do with money.