So you're implying remittances forwarded to construction companies (within X days?), car dealers and by extension any Thai company dissociated from the remitter would be -illegally- considered non assessable income by TRD since beneficial for Thai economy. Interesting.
I think TRD will not start screening bank accounts remittances and ask questions more than they ever did before, simply because they are not capable or willing to deal with all multiple and inconsistent tax and country DTAs rules plus foreign documentation they can't check.