Its not an open door situation if you have to report every 60 days is it. A person who saves to come on holiday doesn't necessarily spend more than an expat. Far from it.
I've never understood this. Keeping a Foreigner as long as possible on Thai soil is good for the economy. People are not eating food or paying for accomodation anywhere else other than Thailand whilst here. All being strict does is make it a waste of money and time for tourists to leave and come back.