That said, there were contextual clues. If you go back, I said, "You get what you need through corruption..." The next reply was agreeing and expanding on that. This strongly suggests that each step in the description involves corruption in some way.
That said, hopefully you're now clear that these blat networks involve pervasive corruption.
When a community that is used to blat networks moves to a different country, the blat network doesn't go away. Throughout US history, it has been common to see blat networks in immigrant communities turn into straight up organized crime. The most famous example being the rise of the Mafia. But it is hardly an isolated example.