Help me understand what you are saying here. For those that don't know this one is "a measure becomes a target, it ceases to be a good measure".
I'm not advocating for a single metric that can be gamed. A business is fundamentally about dollars in and dollars out. Maybe add receivables in there and a few other metrics from the P&L. I'm not trying to be prescriptive here on purely cash in and out.
I do think there is a low friction way that companies could report daily certain metrics that over time would give their shareholders a sense of the company's health and trajectory.
Dollars/receivables in and dollars/deliverables out is just a question of rate, unless I'm missing something.
If a 10 billion dollar company has a per-second dollar out/in rate of $1,000,000 due to actual organic business, a company with $2,000,000 can set up an LLC it buys and sells from, and legally 'swap' $1,000,000 a second back and forth in services "bought and sold" to mimic the appearance of the $10B company, to generate business interest/confidence/investment.
That's an extreme example, but the point is that real-time money flow has nothing to do with the actual 'health' of a company.
All data that is externally visible about a public company will be consumed by traders and used to inform their market behavior.
Companies know this, thus every action they perform that affects an externally visible number is calculated both for the actual intent of the action, and how that action effects the number and the consequent market behavior.
This is why you see all sorts of moves that aren't strictly helpful for the business itself like being overly picky about which fiscal quarter certain expenses are taken in, etc. The more numbers about a company that are publicly visible, the more the company has to play this game.
Of course, visibility for traders is important for market efficiency too. But there is a balance there where you don't want to turn the functioning of a business too much into a perceived popularity game where it spends too much of its effort just making the numbers "look right" orthogonal to what's best for the business's functioning.