Stocks are not a "zero sum game", as you alleged. Stocks can and do create wealth. Not saying GTGP did or did not create wealth, but just because someone makes money it does not mean someone loses money in the markets. Your statement is inaccurate.
Stocks are zero sum game if you don't lose someone else does.
This was not any government's "corrective action", but predivised destruction of the enterpise and the swindling of its shareholders out of their money.