At the point where your device has work software on it all bets are off to begin with. Your employer might straight up require you to use an Android phone. What you're describing is your employer using their free choice to decide where to distribute apps.

Incidentally, employers already have the ability to distribute custom iOS software for their employees, so your scenario wouldn't happen.

Work-necessary software probably involved an enterprise provisioning profile, which for all intents and purposes, gives the holder of the profile full rights to your phone.

As for social, why isn't this happening on Android if it's so inevitable?