I have seen this,
This is construction learned after the collapse of the Soviet Union - Pre Russian Federation.
For comparison purposes they actually did a quite nice job, they probably spent more money on the cardboard then it would have cost to purchase drywall though.
They must have learned construction techniques as Russia began rebounding from their default, this person clearly has become wasteful as a true 3rd world country contractor would have used scraps of drywall of different thicknesses followed by scraps of carboard or any other similary colored material.
Its great to see that there are contractors out there who will overspend to perform a job that at best could not even be considered half assed,
IF they had done it as the way they wanted cost effectively you would see the following words on the walls "karkov, Corona, Budweiser, Etc"
But I bet the person who did perform the job will at some point be offered a job to manage and train subcontractors.