What did siam's do to modernize itself

Siam started schools, reformed the legal system, and reorganized government. Because of the changes in government people escape social turmoil races treatment and economic exploitation.

Loss of funding i think

Many foreign companies buy/build hotels in areas therefore most of the profit from tourism goes to these companies rather than the local economy or local people. 
also, these foreign companies might only employ foreign workers with experience meaning they receive more pay whereas local people would be employed for low skilled jobs and lower pay. 

thats all i can think hope it : )