The employees at Google that are invested in these discussions seem to care a lot about improving Google, they just have different ideas on what needs improving

The employees at Google that are invested in these discussions seem to care a lot about improving Google, they just have different ideas on what needs improving and how to make it happen (to get a sense of how different consider Holzle's 'the majority of your coworkers' comment). Other organizations might manage this by setting up a one or more day workshop or retreat in order for selected employees to hash out the vision and action items.