What's government's role in making the web secure?

There is no kill switch for the internet, no secret on-off button in an Oval Office drawer.

Yet when a US Senate committee was exploring ways to secure computer networks, a provision to give the US president the power to shut down internet traffic to compromised websites in an emergency set off alarms.

Link:

Lots of juicy what-if style ticking time bombs here. These what-ifs don't happen in the real world or cyberspace. Saying, what-if hackers infiltrate a nuclear power station is a reason not to have nuclear power stations, for me, rather than a reason not to have freely operating internet. If hackers get in and know that they could be cut off at any time they will simply design their attacks around the knowledge that they have to get in, set the computers to destroy stuff autonomously, and get out before they are detected. Not safer, just different.