Are Social Media Background Checks Invasive?

I've been fully aware of this and other extensive background check measures since potential employers in my line of work pretty much put your entire life history under a microscope before considering you for employment. I'm about to make a mountain out of a molehill with very good reason. Employers over the years have been gradually squeezing away at their employees privacy for two decades now. One little thing like this does not seem big by itself but when you combine all of their tactics over the years into one unit (drug testing methods, nicotene testing, credit reports, health reports, etc, etc, etc) and then compare this to where we were twenty years ago the amount of privacy we've been losing is astonishing.

What concerns me is where does this stop? What will be next? Will Internet search history checks, phone call monitoring, purchasing history, background checks on personal habit tendencies, lie detectors and very much more follow? This is what I call a backdoor version of a police state, corporate fascism, where corporations buy off the influence of our lawmakers and agencies, which were formulated to protect the common person, for its own gain and profit. Knowing full well that our lives are completely dependent upon receiving a source of income from their employment no actual police, military personel or extreme totalitarian government legislation is needed. It is the perfect tactic of violating our right to life, liberty and the pursuit of happiness that the U.S Constitution gaurantees without (ironically) actually violating our constitutional privacy rights since this is being done through the private sector. Excellent plan for formulating a convenient way in which the government can control the population and its behavior through the clever use of the private sector that funds it.

Do I have the right to express myself through free speech even on the Internet without a potential employer screening me whether it was done in a civil manner or not? Do I have the right to express my political, social and religious views? Maybe I do, for now, but what about in 5 to 10 years from now? I've written about similar issues related to this topic before since this is the perfect way to take away our liberties without actually violating the Bill of Rights and they're doing this gradual enough that we've blindly have been molded into accepting this nonsense for our own self justification of the 'employer's best interests' since we are dependent on them to survive. Just wait until using credit with interest rates for making purchases becomes mandatory to acquire most types of employment opportunities, actually with the credit check system in operation we are just about already there. Where does this end?