In my mind, an employee deserves credit for their work, and if the employee doesn't get just credit for such work, they have a right to be dissatisfied. As a manager, I am well aware of this and I always try to ensure I do right by my employees.
However, it seems there is a separate trend where employees come up with ideas - and I don't mean ideas that took work, like Newton's ideas about gravity or Einstein's ideas about relativity. I'm talking ideas as in somebody just woke up one day and thought hey, you know what, I think we should do this instead of that. And it's a good idea and we'd like to implement it.
However, in these situations, we find that employees seemingly have started demanding credit not just for their work, but for such ideas as well. I was reminded of this trend once again when I read this question (Boss wants someone else to lead a project based on the idea I presented to him) where an employee is moaning about not being allowed to lead an entire project just because they came up with the idea. What makes it worse is when they want to lead projects for ideas that aren't even all that groundbreaking. I mean, the person who asked the question above came up with the idea of using Stack Overflow's new Teams service to facilitate communication in their department. That's hardly even an idea, that's ... well, that's just stumbling upon the service and going "yup, this would be useful", and yet this person is demanding that he lead the entire project.
To me, that sounds asinine. You don't have a patent on an idea. If we like it, we'll thank you for your contribution and keep it in mind for your next evaluation, but we certainly don't feel the obligation to let you lead the development and implementation of that idea. I mean, that's just nonsensical and honestly a little bit childish.
How do we deal with employees who behave in this way, i.e. demanding that they implement the idea they came up with, rather than the person we find best suitable?
Naturally, in some cases the person who comes up with the idea is the best suitable to implement it. But that is for us to evaluate, not for you to decide.