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As far as I understood from wiki it was not "suddenly".
It was part of "requests for liberal reforms" from deputies in 1989. In 1991 USSR fell apart, so it taked time to introduce this system. 1993...

Yes. They were launched in 1993. They applicable if crime is heavy and accused makes request for it.

You are talking about sci-fi action movie which central point is about Counter-Strike, Mortal Kombat and NFS games in real life.
No, it is not about accurate depiction of real life. :) Lock, stock...

Yes it can be. Many examples exist in mass-media. Russia has very big index of "corruption perception" because of it.
Money and connections can override law...



I do not know about such things...

Sometimes effective, sometimes corrupt.



It is not something expensive until case is something about murky affairs of big money business.