I personally don't buy into the millennial crusade against landlords, as it's largely a manifestation of their tendency towards the sins of sloth and jealousy. "Other people have thing, me want thing, therefore they stole it" is about as much thought as they've put into it.

They of course put zero thought into the root causes of the supposed problem, namely municipal bureaucracy and endless red tape that prevents people from building laterally in empty land. Instead they howl that single family homes should be outlawed and replaced with highrise eyesores to... try and bring their own rent down. It's every bit as nonsensical of a thought process as you would expect from millennials, they want to fix a problem caused by zoning laws with more zoning laws. As a demographic they always double down on bad decisions.

As for defining parasite. Simply put, it's most people. If your job can be done by anyone with a pulse, odds are you don't contribute to society. Unions are another example. Ostensibly skilled labor, but they engage in constant labor racketeering to prevent any potential competition and artificially inflate their own compensation, while protecting unworthy workers and criminals. As for middle management, it depends on the industry. Many industries primarily hire from within, and don't promote without knowledge of the subject matter. Government bureaucracy are absolutely parasites, and I don't really need to waste words explaining why.

Now I'm not advocating for the destruction of these people. Merely that they should have little or no political power, because historically the only thing they will ever do with it is vote to further their slothfulness and make functional slaves of the rest of us.