To say that GA is dying is ridiculously simplistic. If you have the time, read the economist's views:
http://www.btre.gov.au/docs/reports/..._report111.pdf
Sport aviation is booming while hours flown in traditional type certificated CASA-registered aeroplanes has dropped as people move to lower cost aircraft for their pleasure flying. CASA GA aeroplane registrations are still growing but at a lower rate than other sport aircraft registered with RAA etc. As well, passengers have moved from charter to regional airlines, so the passenger money has moved from 'GA' to 'RPT'.
So some businesses are booming and others are not. Maybe aircraft maintenance businesses have consolidated into fewer but bigger businesses. Is not this the normal evolution of a mature market? You have to be quick on yer feet to make a buck out of aviation.