It’s not linear, or that simple at all. There is a reason that UPS is stable and make controlled profits, its controlled stable labor. The idea or cheap reliable labor is over in America, baby boomers (aka largest portion of America workforce) are leaving and retiring. Its real simple, look at the massive loses Amazon has taken in its own delivery, they run it at a loss knowingly to control the market. Fedex just took the bait, margins will be made stable at the expense to the contractors. Here comes the squeeze