Sampling music....is it Wrong or Right?

The factor of money is a major issue in the muisc business, sampling a song is okay in my book as long as the orignator gets credit for there work. Such artists as Jay-z & Kanye West, Jamie Foxx, etc sample music all the time, but some artists don't give credit to the orginator. All music has been sampled no one owns a beat, you have to pay for great music. People have been sampling songs for years but when artists started to find out about it they wanted money for it or credit. I believe it's wrong for any artist to sample someones music without some type of agreement with the orginator.
 http://www.music-law.com/sampling.html

Music is Music sampled or not, some music is good and some not so much. Remaking music is the new thing everyone wants to remake a popular artist song.