Everyone who is walking around there has a job,so jobless statistics look better,besides that I guess 80% off government employees are voting for ruling government,it is a win win Situation. Immigration could ask you every year if you still stay same place,if you still married,retired and bla bla and print it out,and give you your extension,but then many people would lose their job,on top of that big boss must sign to show he is the boss,if the normal officer could sign it then no need for big boss.Thais in general think we are all criminals,so better check documents everytime,I also think most government officers have no idea how to use a computer