Your arguments ignore the fact that the GET increase is applied on a per county basis, Kauai residents don't pay into the rail funds. The General Excise Tax is something the state has had for a long time without rail. Your careless use of the term, conflating it with the Oahu only surcharge, undermines the rest of your argument. I'm also dissappointed you request us to prove the absence of a negative, "that the funding of rail is the best use of funds raised". It's impossible for us to contest your endless number of hypothetical counterfactuals, and the fact that we can't doesn't mean that you win the day. 

Rail is a good choice for Oahu to promote more dense urban development, and alleviate the traffic concerns we already have. This is about more than rail, it's about the kind of community we want to develop into, how our neighborhoods and livelihoods will be shaped. The rail can easily be funded by an extension of the GET Surcharge. Prove that it wouldn't be the best thing to do.