Why do they have a claim on your general creativity? My understanding of employment is that the employer is renting my services for the tasks they want done. They say, "Hello, will you please implement these features in our system today?", and I say, "Sure." A permanent employment agreement simply means this will continue upon a regular pay schedule and compensation package for the indefinite future. It may also come with stipulations like "We'd like to hang out in our office most of the time so you can help us on-demand", or whatever, but all of those things are settled and worked out collaboratively before the candidate becomes an employee.
Why does it mean they "have claim on my creativity and work" outside of this scope? I may sign additional non-compete agreements that make it so that I can't engage in any threatening or similar business. I may sign non-disclosure agreements that make it so I can't use any proprietary or secret information that belongs to the company. However, why should I sign an agreement that allows the company to take things they've had nothing to do with without any pay? Does the employee have power to take from the employer without providing compensation? Why should the employer have that power?
Why does it mean they "have claim on my creativity and work" outside of this scope? I may sign additional non-compete agreements that make it so that I can't engage in any threatening or similar business. I may sign non-disclosure agreements that make it so I can't use any proprietary or secret information that belongs to the company. However, why should I sign an agreement that allows the company to take things they've had nothing to do with without any pay? Does the employee have power to take from the employer without providing compensation? Why should the employer have that power?