I am not using facebook anymore, but i had a page that had organically grew its audience and brought a lot of traffic to facebook. I agree that pushing updates every day would clog users' timeline, but there are better ways to fix that. The fact that they chose to take your followers and basically resell them back to you is so dumb that i never bothered to pay up. Shows lack of vision on their part.
I guess they could've simply tied the post range to the inverse of posting frequency - i.e. if you post once a month, you reach everyone, if you post daily, you'll reach some random subset, etc.
But then again, Facebook has to get the money for their servers from somewhere (or at least enough of it to attract more investors). They could've chosen worse monetization strategies.
Just go and count how many things you've liked so far. I have 821 "items" liked, most of them fanpages. If every one of them would be able to reach me with all their posts, I'd quit Facebook on the spot. The users are not there for the fanpages. That's why Facebook won't let companies hit everyone. Now whether or not they should allow people to pay for wider reach, that's questionable, but then again - it at least makes people prioritize. If you have a limited marketing budget, you will tend to pay for and thus prioritize more important communication.