FIFA won't ever find anything because they are getting the biggest piece from the bribe pie.
Qatar spent ~$220 billion for this world cup.Have you ever thought, how a country like Qatar, which is against every western value, has no football stadium, has a complete shit football team, hosting a world cup?
Did you think FIFA let them be the host for free?
How many billions did the FIFA got from Qatar as a bribe?
Even Blatter admitted that Qatar won the right to host the World Cup through corruption. In general, there are a lot of officials in football and therefore there is a lot of corruption. I read that PSG's financial injection was part of a scheme that made Qatar host the World Cup - Qatar bought fighter jets from France for many billions of dollars, bought PSG and poured huge money into it. This is corruption of the highest level and I don't know how ordinary people can deal with it.