Is there any evidence of this? Otherwise please don't post unsubstantiated rumors on this site, it's not what it was made for!

Do you take contention with the part where I indicate the money paid goes into the state coffers?

Or the part that money from the state coffers is then laundered to friends of the political class via favored private enterprises that win contracts?

Let us be specific about the part that is the "unsubstantiated rumor", so that I can come up with "any evidence" which is a low bar to pass indeed.