it always suprises me how many people simply dont know the difference between a Phillips and a poziI would venture that the bulk of these "problems" are down to poorly formed threads in busbars and on terminal screws which are made from poor quality materials in the first place! Compare them with those old fashioned things that some of you are so fond of needlessly replacing sometime!
The rest is down to people who first don't know how to select the right screwdriver for the job, how to use it properly and how to look after it properly.