The deteriorating relationship between what people widely consider 'employer' and 'employee' has put a lot of societal structures (businesses, democratic governments, etc.) at risk since income provides the abstraction most use (money) to provide necessities and wants.
Most all of these institutions are able to continue to exist because people accept their artificial constructs and play the roles due to wide belief that it provides a better life. In many places, quality of life or at least perception of quality of life is deteriorating for large segments of the population. This is, IMO, causing wide rejection of modern institutional roles laborers are dealing with. Many employers are breaking the social contract and people aren't happy--this is a risky game to play.
I propose much of the political unrest we're seeing in US politics is symptomatic of the population's general unrest and rejection of continued shifts against your typical laborer.
We can play legal/semantic games about how we define 'employee,' 'employer,' and 'contractor' but ultimately, if the general population disagrees, no matter how well we construct our rules and arguments, the institutions will fail if people widely perceive they're being cheated/deceived.