The argument about the "risk-tasking investors" rightfully owning the work of the "risk-free employees" is an appeal to fairness (the investors could lose their investment while the employees still gain their salaries), so by the way it does seem that you are interested in that.

Early efforts in organizing the company and navigating difficult waters are work and those employees should be compensated with ownership. I don't think that subsequent work by subsequent employees should not be compensated in this same way. Mark Zuckerberg and half a dozen friends created a company valued at $98M by Accel in 2005 and enjoyed ownership of that. Today he and 15,000 others create a company valued at $360 billion, of which he enjoys 25% ownership while the combined ownership of the rest is miniscule.

Founders and early employees contribute work and are hopefully rewarded for that work with ownership stakes in the company. Rightly so. But as the company grows, and to the degree that it necessarily hires additional employees, the proportion of ownership held by these early employees becomes undeserved (in the simple above sense of the word). Their large ownership positions remain, even as it becomes clearer and clearer that the value of the company is created by its hundreds/tens of thousands of employees.

So if you start a business and make a profit (a hard thing to do!), that is not undeserved. But if business grows and eventually the value is created by 15,000 people all together, you don't deserve 25% of it.