By definition music has always been a collaboration between musicians. The use of audio samples and midi loops follows in this tradition.
1. Session musicians were used extensively by musicians in the past. Motown and Atlantic used session musicians. The Beatles, Stones, Beach Boys used session musicians. The session musician often played the difficult passages for the musician who hired him/her.
2. Composers have always 'liberated' passages of music from other composers to create new music. No musical idea exists without a precedent. Nothing is innately original except in the manner in which it's used by the composer.
This is the essence of modernist art and using various sources to create something new is common practice in art. The reason 'ownership' has become contentious in music is because of the battle over copyright. We've been brainwashed to regard music as a commodity and the battle is over how to define this 'property' instead of focusing on creativity.
3. Sampling has been used extensively by the founders of electronica. It's just that with the digital age this process has become much easier and available to almost every musician. It has even contributed to the decrease in demand for the session musician.
There is nothing innately 'uncreative' or 'cheating' about using a sample of any length in a new composition. The fact that musicians have done so creatively for decades inspite of the growing battle over copyright demonstrates that it's an essential and creative element of out musical repertoire.
Carry on sampling!
