While I have no doubt that the EU has corrupt politicians, It’s no where as visibly bad as it is in the US. Most of the people who could bring this forward get something out of what he is doing or contributing to them, and they would rather turn a blind eye than risk losing whatever he is giving them.
For some it’s helping out their base, for others its something more monetary.
There are mechanisms there, but they only work when the people watching them are invested in helping the citizens.