That's not how prediction markets work. People aren't supposed to bet on whom they want to win. People are supposed to be searching a profit, that is find differences between the odds given in the current market and what they perceive as the true odds.
People who do this consistently over time, tend to accumulate more money, and thus accrue more influence as time goes on. Also people who bet foolishly, e.g. just bet on who they like to see winning, create opportunities for other people to make money of their back.
