It's a typical government thing and Thailand do this often.
They throw out an plan or idea to the media with an optimistic delivery or build date and then once they look carefully at what's involved they have to revise or change plans..
There are very limited work opportunities in Thailand for foreigners..
And you need an employer to sponsor you to get a work permit even for the very limited opportunities available to legally live and work in Thailand..
If you are a good English language speaker and especially if have some teaching experience then that's one of the very few job opportunities that are available in schools as an English language teacher.
There are others in highy skilled IT or management jobs for foreign companies in Thailand but you need the have experience and relative skills of course for those.
Salaries are generally low except perhaps for very specialized skills and jobs..
Good luck but you will struggle to find anything at all.
If you are asking can the visa exemption entry be extended ?
Then the answer is yes.
You can extend 1 time at any Thailand immigration office and pay 1900 Baht for 30 day extension..
If you overstay your visa exemption then you must pay a fine and the overstay will be recorded against your passport and that could affect your future entry to Thailand.