This is done on purpose, apparently: he basically wants to "rub it in" and demonstrate that as long as his proposals are not implemented then the most profitable behavior (under the assumption that people are machine-like, shortsighted maximizers) is to self vote. Therefore, to prove his point, he engages in that ostentatious behavior.
My fear is that as soon as his proposal gets implemented, another whale will feel "this is not right" and devise an ingenious way of abusing the @trafalgar system ... So we'll be back to square 1 ...

