It's a law from 5 decades ago. An immigrations officer thinking he can still use it today has a bigger problem at the end of his (then last) working they than you. Can you imagine the headlines if one person got refused for having money in the bank?
It actually happened a year or so ago. They Thais started an investigation about what actually happened. It was clearly toned towards the immigrations officer's decisions being under scrutiny, not the fact that someone held money in the bank. The investigation concluded by the way the the claims were false and that the person in question was not refused entry, i.e. also not for having money in the bank. She was just a sensation seeking YouTuber. The statement dismissed the requirement as "secondary". But in the end, the headlines and media outrage that I imagined also before the incident, it was actually there ;)
maybe you misunderstood. Leaving Cambodia there is nothing Cambodian immigrations could possibly harass you with. If you had problems, it should have been with Thai immigrations.
check bag 15 kg, that's not the story of the opening post. There it was carry on and 5 kg over 25. I'm not on drugs, I read your post. You don't seem to remember what you wrote there, and you reply offensively to people who do. Are you on drugs yourself?