The bids must include full accomodations for the IAAF Congress, hundreds of IAAF Family delegates and spouses, and lavish expenses.
Free airfare, 5 star hotel rooms, food, rental cars, banquets, etc. must be included for the hundreds of members of the IAAF Family attending the IAAF Congress. You see the IAAF Family at every IAAF World Cross Country and IAAF World Championships. They wear the blue credentials and are exempt from security screening.
The IAAF Family always take up thousands of the best seats at the finish line, but are absent during the finals, drunk, and pre-occupied schmoozing around. They always have a glass of wine and a plate of cheese with them. They are upper crust, privileged/ruling class people from the IAAF member countries.