And all the conductor ones are basically capitalist industrialist brainwashing encouraging the user of the stickers to become just a cog in the wheel of "progress"
Bottom says all on board... because the goal of a capitalist industrialist society is that everyone is to perpetuate the system
"You are a really useful engine" is of course the system telling every worker that they are the engine that drives the machine, that without them the system would fall. It is a false compliment designed to keep you placated, engines are seen as individuals who drive the system... but of course everyone is told they're an engine, it allows work to server their duty as simple cogs in the machine while believing their retaining their individuality. It allows them to believe they are important while being infinitely replaceable.
"You have caused confusion and delay" Blatant anti-union propaganda, also you cannot just keep the system running on positive feed back alone otherwise the worker might actually start to think highly of themselves and realize that they are in fact not being treated the useful engine they had been told they were. Why they might even organize, group together, realize that they are all being told the same lie. Hence before such thing can occur (or in some areas should pro-unions begin to form) you are accused of causing confusion (of course here understood as trying to help others realize their own false Independence) this is mostly for show it is likely not going to convince you that you are doing something bad (after all you know what's what) but it is to cause those around you to now doubt you, you are an individual alright and insidious one... that is causing delays... delays of course ruin the perfect efficiency of the machine, the machine that everyone is taught relies on them, that everyone is taught is carried by their engine, so they shun you turn from you and return to work unquestioning... leaving you to now be confused and before you know it you realize if you continue to cause delays you might hurt the system that needs you so badly so you return to being an Engine... and this repeats as necessary when any "engine" should open their eyes to the truth.