Why managers don't recognize their employees

The title really isn't a question but maybe it should be. There is an ambundance of research and evidence that suggests that employees are more engaged motivated and perform better if they feel recognized and appreciated. Still some managers do not see recognizing staff members as a value part of leadership. The following video blog talks about 3 of the reasons managers may use to minimize the importance of taking time to recognize employees:

https://www.youtube.com/watch?v=YGZ_VKYgKvM&feature=youtu.be