Question about blogs and newspaper companies

So I was wondering, what's stopping newspaper and media companies from buying the software companies that developed the software for blogs and then making everyone who has a blog pay for posting content?
Code the media content so the only way it could be posted was for it go on a site that subscribes and for big blogs, the fees would be substantial, along the lines of what papers pay the AP. For the guy running a minor-league fan site, it would like $4.99 a month or something.
So it would be a tiered system where the more content you post, the more you pay for and to operate some blogs, it would still be free. If you pay more, maybe you get more access like photo archives and exclusive content directly pushed to your blog. Pay more and you get some nifty gadget like a flip camera to upload video and maybe technical support from the media companies as well.
Subscribing blogs would also be linked to on the media company Web sites and some other benefits might come along as well, like they might get paid if they provide content to the media company.
Other software companies might spring up, but quickly threatened legal action would help deter some of that. Suing the bejesus out of some folks who wouldn't play along would help as well. And not just the blog operators, but their internet service providers as well.
If the software companies couldn't be bought, partner with them and cut them into the money.
Yeah, it would be a lot of money on the front end, but it also seems like the payoff could and would be immense. You have a way to monetize content and tame a little bit of the Wild, Wild West aspect of the web.
So surely I am missing something because it seems like this would work.
So what say ya'll?

 

I could code a basic blog-publishing software kit in a few days' hard work and publish it for free all over the internet.

You'll never get all the blog publishers on board, and if you did, another one would just start up for free.