Congress should bring back the "FCC fairness doctrine"[0] and tie it into tax deductible for news outlets. If you're willing to be an unbiased source for news, you get tax benefits, if you want to be partisan you're a private company.
We have a news company called CBC here in Canada that is supported by tax payers and is supposed to be politically neutral but everyone knows its a left-wing partisan news source.
It's just the nature of the business (ie, editors/writers/university english depts tend to be left leaning and then fill the news room with like minded people, with maybe one token conservative guy like NYT does) and even more so when its existence becomes tied to government spending and policy.
Not to mention how hysterical and FUD-filled politics has gotten recently I'm highly skeptical that anything non-partisan wing will be tolerated.
You know, I disagree about CBC. I get its newsletters, the daily Alexa bcast, and see its YT videos. From my US-based perspective, it seems that they went well out of their way to be balanced in their coverage. They could have buried SNC Lavelin but it was amazing how long they kept up coverage. Their YT channel had daily "Scheer campaign day X" but I didn't see the corresponding videos for Trudeau.
The mistake people always make is assuming left wing partisan = blind support for Trudeau/liberal party. Which is not what that means. The CBC isn't being accused of being a propaganda arm for a particular party. Not is it not about just blatantly supporting a single centre-left political party.
The biases are about ideologies and how idea/stories/people are presented, spun, or casually dismissed in general. A big one is what sources are used.
Additionally, even shamelessly partisan rags like WaPo or Vox would be critical of obvious democrat mistakes too. The bar isn't that low yet where something like SNC wouldn't be covered. It's often in the details and the stuff not said or treat uncritically.
Would you provide some examples of where you think CBC is being left-wing partisan? Also, I wonder why you are so focused on left-wing partisan examples and apparently not at all on right-wing partisan examples?
[0] https://en.wikipedia.org/wiki/FCC_fairness_doctrine