Not worry this - there’s overstayers to catch!!
If you make it impossible to get a VISA and people already have financial interests - they WILL try to stay!! For those posters comparing Thailand to western countries in terms of illegal stays, you need to think about the demands that the visa regulations and the uncertainty is making on people who WOULD stay legally if they could. In UK if you’re married to a UK citizen your application is looked on far more favourable than if youre married to a Thai.