Billy Bragg — British Musician born on December 20, 1957,

Stephen William "Billy" Bragg is an English singer-songwriter and left-wing activist. His music blends elements of folk music, punk rock and protest songs, with lyrics that mostly span political or romantic themes. His music is heavily centered on bringing about change and getting the younger generation involved in activist causes... (wikipedia)

In that sense, I became politicized because the people in the coal mining villages who were involved in the struggle knew why they were there. But they couldn't understand why some pop star from London would want to be there.
All musicians start out with ideals but hanging on to them in the face of media scrutiny takes real integrity. Tougher still is to live up to the ideals of your dedicated fans.
I'm still batting away on my politics for the Labour Party. I'm much further to the left of them than I used to be, but that's because they've moved, not me.
My theory is this; I'm not a political songwriter. I'm an honest songwriter.
Were it not for the Clash, punk would have been just a sneer, a safety pin and a pair of bondage trousers.