Recently over at The Workplace there was a question regarding an employee withholding valuable information that they developed in their spare time. According to their employment contract all intellectual property they develop, regardless of work hours, belongs to the company.
The company also recently slashed the incentive program that the employee has been generating a significant amount of their income from. (A quick estimate provided a $60k/year difference in income for said employee.)
Since the employee only spent their off hours developing this intellectual property for the obviously significant incentive money, is the employee entitled to any compensation or the right to retain the property?
Since I don't have the actual contract I will simply assert for the purpose of this question that the contract has no stipulations regarding this.
As I am in the United States myself, I am mostly concerned with answers from the US. However, I would be interested to hear how this would be handled elsewhere as well.