Final Fantasy 14 will give you a dog (among other rewards) for paying your taxes—if you're in Japan, that is. There's really nothing else I can say that isn't funnier than the truth of the situation, though I'm not pointing and laughing at Square here. It's a genuinely sweet incentive to have players contributing to other municipalities.
As reported by Famitsu, Square is partnering with the Shibuya Ward (which it has an office in) as part of Japan's "Furusato Nozei", a system whereby urban Japanese residents can voluntarily put forward some of their money to rural areas of their choice, such as their hometown—in exchange, they get gifts, such as travel tickets, gift cards, and so on.
