Here's my question, HOW can the government possibly force anyone to unlock the iPhone? Even if the government imposes sanctions against Apple forcing them to cooperate, wouldn't Apple's employees, law-abiding citizens (mostly) of the U.S., have every right to refuse to develop said program? What would happen to them? If Apple clearly doesn't want to create the program, are they going to threaten to fire their employees who, as individuals, refuse to write said program? Can the government force Apple to force their employees to write this program?
Imagine getting fired because the FBI wants to crack into someone else's phone. Someone you've never had any interactions with. What if all the developers with the necessary skills say no. Can the government force Apple to hire or train other people to write said program? Can they force Apple to hand over IP to another company, allowing said company to write said program?
This goes far beyond one phone, anyone who can't see that is blind.