Everyone 18+ can already vote…Not everyone can get married. Soavoting tax would be ex post facto. The same taxes married straight couples pay being extended to married, gay couples would not be. Apples and oranges, buddy. The author clearly believes in the rightness of gay marriage and is simply tacking on some financial benefits to doing so. They are not saying that we should justify making any political decision inavacuum because of potential monetary benefits. The article just highlights whataplus it would be. They are also pointing out the hypocrisy of Republicans spending money on trying to prevent LGBT folks from marrying when said Republicans are constantly harping about financial responsibility and the economy.