Oakland might bite the feeding hand?

Uber will only be moving a few hundred and not a few thousand employees to downtown Oakland, which is creating an opportunity of available space for other tenants. However, Oakland might bite the feeding hand by suggesting it would tax tech companies which come to Oakland. To me, that is a crazy idea, and Walnut Creek, Concord and San Ramon have millions of vacant square feet of office space just waiting for tech companies, and no tax on tech! (SF Business Times)