"Akenaton and Johnny J having read through your waffle can you please explain to me in simple terms why no Scottish Government since 1999 (All of which have been "socialist" governments in nature) has ever used the tax raising powers they have always had to address what they perceive as being "Scottish problems"."

The 1999-2007 Gov wasn't socialist (Neither is the present SNP actually, it's social democratic) and was even a coalition with Lib Dems. At that time, Labour were also in power at Westminster and, presumably, Scottish Labour didn't want to be at odds with their English colleagues re taxation.

I can't speak for why The SNP Gov didn't use these powers...The Swinney One allowed them to expire
http://www.bbc.co.uk/news/uk-scotland-11792876
but they were a minority Gov and would have had difficulty getting it agreed anyway.