The Moser Report, completed in the 90s, found that over 7 million adults had problems with basic literacy and even more struggled with basic numeracy. In Britain, a huge number of adults have literacy levels expected of an eight year old.
This government have spent a huge amount on the Basic Skills Strategy and results ARE improving but it is wrong to say the basics are not being taught in schools. They ARE being taught but people are not engaging with them and many people think that you can earn a living perfectly well without being able to spell or write properly. It is ingrained in the English culture and poor, slopping spelling, writing and grammar have been a faeture for decades.
There is no excuse for a person with a degree in English not to be able to use an apostrophe. It's like a doctor who can't give an injection.