One half dismantles the building illegally or unethically, then hands the tools to the other who says they can’t fix it, who then hands the tools back for further disassembly.
Meanwhile both have parachutes due to insider trading, so it doesn’t really matter if other people in the building are killed when everything falls apart.
There was an actual building under the plank, which was dismantled in the last decades
One half dismantles the building illegally or unethically, then hands the tools to the other who says they can’t fix it, who then hands the tools back for further disassembly.
Meanwhile both have parachutes due to insider trading, so it doesn’t really matter if other people in the building are killed when everything falls apart.