One problem I think with that (at least in principle) is that the people who are already with the company, and (at least hypothetically) have some sort of desir

One problem I think with that (at least in principle) is that the people who are already with the company, and (at least hypothetically) have some sort of desire / incentive to see the company succeed, have a particular skillset. To completely abandon that skillset in order to form fit the company to the most popular idea from the crowd could possibly be disastrous. Perhaps it would work if they made a conscious effort to ensure the idea the crowd proposed aligned well with the skillset / experience the employees already have.