Judges may think of their families, communities, and countries; in something of this scale it would be hard to be impartial.
Compared to the combined national budgets of the EU member states the fine amount would be a rounding error.
If a politician came to them and said, "we're going to use that $6B to fund this particular program," well sure, but that would seem to be a subset of bribery.
[0] https://en.wikipedia.org/wiki/Economy_of_the_European_Union