There's no "right-wing" or "left-wing" or even "center" Imperialists in Discovery Freelancer. Stop bringing in RL ideologies and beliefs beyond simple guidelines (ooRP ones, that is, i.e. like BretGov has for the different parties as a reference point so people understand what's going on better) because it ends up in disaster and just makes you look like a buffoon. The only thing the Imperial Party of Rheinland ever stood for was power and money, it was never intended to be a way for people to ramble about how they are fascists like people do nowadays to Liberty lawfuls.
It also isn't said anywhere that they were against the workers, because if we read through what the infocards say, the Imperialists are a bunch made up of disgruntled soldiers and royals who are extremely against working with Liberty due to the toll their "cooperation" took on Rheinland as a whole. Their relation with the workers/farmers/what-have-you is undefined and is best left undefined until story will make up its mind on what and how Rheinland should do things to avoid another player-led charade that ends in total and utter disaster.