In Thailand, individuals who stay 180 days or more in a calendar year are considered tax residents and are taxed on all income earned in Thailand, as well as foreign income brought into Thailand in the same year it is earned. Non-residents are taxed only on income earned in Thailand.
I went to KBank in EmQuartier and had zero problems getting a bank account. I am pretty sure they also asked to see another form of ID beside my stamped passport.