Can popular music achieve genuine political change?

Frith and Straw said that "Pop Becomes the expression of its political and social context" which would support the opinion that pop music is intertwined with politics. There have been cases where artists have tried to make some kind of a change with their music, such as Bob Marley with 'Get Up, Stand Up'(1973), which was widely sold,  where Marley talks of how people have to stand up for them selves and never give up, had an impact on people and their thinking. The other, more obvious example of how music can in fact influence politics was seen in ‘Band-Aid’ and ‘Live Aid’ where they raised over £50million for the children of Africa. Although there was a lot of criticism of this event, the fact remains that it got peoples attention and managed to make more money then the government could have hoped to for the cause. This alone is a perfect example of how popular music can achieve genuine political change.