Without the financial backing of Saudi Arabia's Public Investment Fund, this summer's Club World Cup could have looked very different [Getty Images]Saudi Arabia's money is underpinning the revamped Club World Cup.But why has the country helped to bankroll an event that has struggled to generate interest, drawing criticism for the impact it could have on players, domestic leagues, and the environment?For those wanting to understand the forces at play over the next month of competition in the US,