Three months ago, Mr. Price, 31, announced he was setting a new minimum salary of $70,000 at his Seattle credit card processing firm, Gravity Payments, and slashing his own million-dollar pay package to do it. He wasn’t thinking about the current political clamor over low wages or the growing gap between rich and poor, he said. He was just thinking of the 120 people who worked for him and, let’s be honest, a bit of free publicity.