Earlier quoted context omitted.
So over 20,000 employees would leave the Googleplex every day at noon to get lunch? This just means the next massive campus complex will not open in Mountain View. Big profitable companies and their hordes of tax paying employees will go elsewhere, and definitely will not be supporting MTV's local businesses. Welcome to the wonderful world of unintended consequences!
No, maybe they would come to the Googleplex. A huge boon in food trucks.
Access control is vital in a location like a tech company's headquarters. With hundreds of random food trucks coming and going every day, such control will become impossible.
Finally, food trucks are notorious for cutting corners when it comes to food quality, especially any health concerns. I would now want myself or my employees eating from food trucks all day, every day.