I personally believe there could be a few ways of going about this. With dedicated white listed EMS there could be a whole new element of RP added to the server and a brand new and fresh thing that everyone could do. It could be similar to the APD to an extent with a sort of progression of rank. Obviously, there would have to be incentive, and a higher reward for the white listedd EMS to want to go through the trouble. This could be done through increasing the value awarded to EMS on their side while still only taking the 1.5k from civilians. Another incentive would be as the EMS are promoted to higher ranks they could unlock new and better equipment, such as better helicopters, better land vehicles, and possibly even differently styled uniforms like APD higher ups. If done correctly I believe this could be an awesome change for the better. Thanks
EDIT: Please give all feedback on how this could be done or anything that you can think of. Positive and negative helps!