Journalism exclusivity protection

I feel the quality of journalism in the current news media falls below that standard that I would like. In particular, there is insufficient focus on investigative journalism. I don't believe the poor quality of journalism reflects the lack of intelligence or hard work of the journalists, but rather the economics of providing news. Investigative journalism costs money and doesn't generate sufficient impact to circulation. I wonder whether it would be possible to protect the exclusivity of a story in law (say for about a week) such that readers would be forced to buy the particular news service, rather than picking up the story second hand from their regular news service. This would make investigative journalism more economically viable.