Think eVisa has changed that.
Check out the eVisa application thinking you will find this statement....
"Financial evidence showing monthly income of no less than 40,000 THB or having the current balance of 400,000 THB, e.g. bank statements, proof of earnings"
Covered in this thread
https://aseannow.com/topic/1344893-single-entry-non-o-from-savannakhet/