There are obviously a number of issues with this idea (as others have mentioned), but as a member of your 'target population' (a firefighter and paramedic), here's something that hasn't been mentioned yet:
>What if the $ went directly to the first responder?
I'm assuming you mean for these people to respond when they're off duty. It varies from state to state, but generally speaking I'm covered by Good Samaritan laws as long as I'm doing what I'm doing without expectation of compensation (if I'm on duty, I'm covered by my employer's insurance). So as soon as you offer to pay me, I'm no longer covered, and I'm not going to touch you with a ten foot pole.
>What if the $ went directly to the first responder?
I'm assuming you mean for these people to respond when they're off duty. It varies from state to state, but generally speaking I'm covered by Good Samaritan laws as long as I'm doing what I'm doing without expectation of compensation (if I'm on duty, I'm covered by my employer's insurance). So as soon as you offer to pay me, I'm no longer covered, and I'm not going to touch you with a ten foot pole.