#51, Chief, I would say that the south will be doing more okay than other areas if all the tourists were to suddenly disappear. The islands might be hard hit but they can fall back to rubber and fishing. The people most hit there will be those resort investors from BKK and girls from up north.
I think geographical-wise the south has more potential to be industrialised and be an exporter of consumer goods, just that the Thais are seeking easier and cheaper means of revenue from its islands instead of investing in deep harbours and ports; and latex related industries.
Anachak, they are agriculture produce, and pineapples, rice, and coconuts have limited markets, and cannot be hugely expanded to absorb any fallout if the tourism industry dies. While Thailand has more rubber trees than the malay peninsular (which has more palms than rubber now), its southern neighbour is the number one exporter of surgical gloves in the world. The fact still remains that Thailand has the biggest tourism industry in the region and is heavily reliant on it.