When the government is monolithic (which it tends to become) and holds a lot of power it is just a matter of time before "some animals are more equal than others". The best safeguards I know about are 1) limiting the power of government and 2) checks and balances on what powers they do have.

Nothing is perfect, and even having the two pillars above does not guarantee eternal justice (or even that the pillars will remain in place). But we can try to keep remembering and demand better. Sincerely: Good luck, EU.