I did a little goosearch and here is what I’ve found (phrases I searched and number of results in thousands):
“Positive thinking”: 1,500
“Negative thinking”: 400
“Realistic thinking”: 40
As a way to balance the governments’ budget I can suggest taxing positive thinking, the same way other "reality get aways" (alcohol and tobacco) are taxed.
Would you support this new tax proposal? :)