The data for the prediction comes from

“When an Excel spreadsheet runs wild | Bill Mitchell – billy blog”  at

CBO budget produces GDP prediction is in 2005 $billions and  18460  19010  19940  21245 for years 2013,2014, 2015 and  2016
compared to RP GDP prediction: 13950 14315 14490 15250, if the ratio of GDP to Government holds at 5 (which it has from 1969 to 2009). This wold be a loss on the order of 5 trillion dollars. So much for the “deficit crisis mania”. The two plots show the predictions.