They want to see the money you pulled out of the 401k. A 1099R or a tax return also does that - if it is a return for just yourself - not a joint return
Regarding the LTR Wealthy Pensioner visa, they simply didn't do enough market research. Not that many retirees, who desire to live in Thailand, have that much passive income. Maybe $40k alone would have been a better requirement.
Yes, the Thai's are not happy with two Swiss farangs right now. And for good reason in my opinion. One beat up a 58 year old Thai lady in a grocery store. It caused a lot of damage to her face. The second evil Swiss farang kicked a 26 year old female doctor. He didn't like where she was sitting (which actually was public property).