I am shocked that NJ is preparing for this. Only bad words come into my mind. I am also in NJ.
I understand that you have written the letter in anger just like I feel right now. From my first glance on the issue, my understanding is that this senator does not have much support for this proposal. In any case, I think we need to write the letter in more positive way. We need to stress the alignment with the federal policy that supports EVs.
I have no idea about number of EVs in NJ but in my town, we are 3 with EVs, each of them is a different brand. Thus, I cannot verify the number of EVs in NJ. The proposed EV tax rate of $0.008 per mile makes $96 per year for 12,000 miles. Given the population in NJ, the Transportation Trust Fund (TTF) budget of $750MM breaks into $84.6 per year per head, which includes infants. The TTF is funded via tax on gas, which of course includes businesses (e.g. big trucks) so, this simplistic calculation is overblown. In addition, many drivers from out-of-state (including trucks) purchase fuel in NJ whenever possible because it is cheaper here - this is a surplus for TTF. Actually, even EV drivers are indirectly contributing into the TTF because we buy merchandise that is being transported by gas (or diesel) trucks so, $96 per EV per year is nothing but revenge of gas lover on EV lovers.
Regarding the argument that EV driver's don't contribute to the TTF, which sounds as a fair statement, I would stress that, as a consequence of EV charging, the state will collect more tax on electricity and this surplus tax should be routed to TTF. So, TTF should be collecting the fee from the state.
According to online resources, NJ state collects $0.145 gas tax and $0.041 special tax per gallon. If you buy hybrid car that gets you 40 MPG, this totals to $55.8 per year for 12,000 miles. If you are correct about 15% tax on electricity, than EV with efficiency of 4 miles/kWh and utility rate of $0.17 per kWh (what I pay), then the state tax totals to $76.5. So, we already pay more!!!
You are right that electricity is more expensive here in NJ while gasoline is one of the cheapest in the nation.
I would drop the argument of vehicle size as Tesla makes heavy EV's and Volt is heavy, too.
So, in the end, we don't have to yell at him, we outsmart him by providing better arguments.
Let me know what you think. We have to take an action.