Silicon Valley is draining away the economy's most precious resource for its own benefit.
OK, I'd better explain that.
The economy's most precious resource is human attention — specifically, the attention people pay to their work. No matter what kind of company you own, run or work for, the employees of that company are paid for not only their skill, experience and work, but also for their attention and creativity.
When, say, Facebook and Google grab user attention, they're taking that attention away from other things. One of those things is the work you're paying employees to do.
As a thought experiment, imagine that an employee who used to pay attention to your business eight hours each day now pays attention only seven hours a day because he or she is now focusing on Facebook during that last hour. You're paying the employee the same, but getting less employee attention for it.