I guess you have no idea how much work is involved in fielding a decent P2P client. Nor do you have a clue what the cost of serving a client to the masses is.

How would you pay for this:
(eg. Morpheus): 15 million files downloaded @ 707KB/user = ~10000 GB of bandwidth.
Considering you can get bandwidth for no less than $2/GB that works out to ~$20000+ StreamCast paid for users to download Morpheus just last week.

That bandwidth doesn't count their web traffic, the cost of web infrastructure, or management/maintenance of it. (I admit, with Morpheusp they have no overhead for development)

So if you think companies are greedy just because they expect some revenues for their development efforts, you're ignorant. Grow up and understand that people work for money, not for your pirating pleasure.