What is not understood by many is that a recording artist does not get all of the proceeds from the sale of their records. They typically get only a small percentage. The proceeds are shared with music publishers, musicians, song writers, distributors ... just like book authors, artists need quantity of sales to make any appreciable money.
If someone like dc1971 buys a record, the artist he admires so much gets a few cents from the sale. If he then makes his single purchase available for free to anyone who wants it, the recording artist makes no money from additional sales. This is in a very real sense robbing the artist of his paycheck.
That is why the penalties for infringement are so harsh. And deservedly so.