I have 3 friends, long term residents of Thailand, who moved to Cambodia around 6 years ago, mainly due to lower costs there.
I was first in Thailand in 1985 and it then seemed 'comparitively' much cheaper then than it is today. Back then Happy Hour in Soi Cowboy was 25 Baht a drink, and an 'all-inclusive' night out cost 1,000-1,500 Baht.