Oh, quite the contrary, the report was very much about those Goldman Sachs tricks and how they exploited legal loopholes. And also some not so legal loopholes. That was then. I am fairly sure most people here are already aware of the general mess that resulted in Greece being accepted to the Euro zone.
I merely replied to the topic of the Greek financial administration not being on top of the time wrt to tax collecting (and auditing) procedures.
I don't know how the ministry works internally, but annual tax returns can only be submitted through an internet portal so I presume they're processed electronically on receipt. If you can't do it yourself then you pay €50 or so to a local accountant to do the job, which drives me nuts as the office gets clogged with elderly Greeks using it for a gossip-fest.
As for small retailers using the lack of cards for tax avoidance purposes, well, I seriously doubt it. They all have electronic tills and face severe penalties if they fail to issue a receipt. If all you bought was an 80c loaf of bread they will still insist on giving you the receipt.
to me