3. One gigantic corporation runs the world
The world of Pokemon is run on... well, Pokemon. They're cheap labor, and they are used for everything. But in order for Pokemon to be trained and captured, there needs to be an ample supply of Pokeballs, and only one company mass-produces Pokeballs: Silph Co. Some other companies make them, but no one else has the market completely cornered.
It doesn't take an expert economist to explain why this is a bad thing. Silph Co essentially owns the world, as evident by the fact that there's a Pokemart in every town. Though they're not owned by the same people, Silph Co has an exclusive deal with Pokemart, and – shocker – that's the only widespread place of business in the entire series. Well, that and the Pokecenter, which only heals Pokemon if they're in Pokeballs. That are made by Silph Co. Noticing a trend, here?
If Silph Co decided to raise the prices, or, for whatever reason, stop making Pokeballs, the economic repercussions would be absolutely catastrophic, leading to an overpopulation of Pokemon and a financial crisis that would bring the entire world to its knees. Yes, Silph Co is that powerful.