I do not consider any pieces of information private if it is posted anywhere on the Internet. If you are going to post something online you should make sure that it is something that is ok for everyone to see. Even if you make your Facebook, Twitter or Instagram account private people still can find ways to see it.
I don’t think there is a problem with either corporations or the government seeing your information. If you are going to post information online for many to see then it shouldn’t matter if corporations or the government see it. Also, if you are being hired for a job and they want to see your Facebook I think that it is perfectly ok for them to view your profile. They do not want to end up hiring someone who is posting information that is inappropriate.