Reading the complaint, it's not just that a PayPal employee went to work at Google. According to the complaint, Bedier (one of the defendants) was negotiating

Reading the complaint, it's not just that a PayPal employee went to work at Google. According to the complaint, Bedier (one of the defendants) was negotiating a payment deal between Google and PayPal while interviewing with Google. And soon after Bedier left, Google apparently scuttled the entire deal. And there's the matter of Bedier putting PayPal strategy documents on his personal machine days before leaving PayPal for Google. Of course, we're only hearing one side of the story at this point, but at least from PayPal's perspective, this isn't just about losing a couple of executives to Google.