The reason you have to work is because the game is based on a BBC show called "Race across the world" where you have to race from point A to point B with the money equivalent of an air fare for the journey.

If you run out of money in the show or your funds are running low you can work to earn more money. So that's why I added that feature. I do think it adds a extra layer to the game as it's something you always have to think about