Note here that the argument for the Order is valid for Police/Navy as well. The IDs are not allowed to take bounties and fines are usually forwarded to a national armoury, not kept by the player. In addition, in RP police should be doing the fines, not Navy.
Also, when these IDs do escort instead of patrolling, it is pretty much always without charge (part of the job). Technically police/navy can trade, but that just takes us back to the beginning of the argument.