What Is This Fallacy

I think that when a question is asked it should at leastvbe presented as an argument. What is the manager's argument? Premises? Besides, why do YOU think it is fallacious as you asserted?

Great question.

Sounds like a moral fallacy rather than a logical fallacy. Maybe you should invent a clever name for it? 

The fallacious argument is of the form "X benefits Y.  Therefore Y approves of X.". My new name for it is Non-consentual Benefits.

OK, cool. Spread this around and you might become famous! 

This is not a new logical fallacy, and we need to be aware of 'fallacifaction' (where we get obsessed with finding these little logical errors in arguments to the point where rather than testing a series of claims we're just looking for the chance to dazzle someone with a pretentious buzzword).

P1) X benefits Y.

C) Y approves of X.

This is a standard non sequitur; something already covered on this website. As you can see, there is a missing premise between P1 and C (conclusion), meaning the premise supplied does not imply said conclusion.

We can plug the leak like this:

P1) X benefits Y.

Implicit P2) Y will support whatever benefits them.

C) Y supports X.

Now we have a formally valid, but persuasively weak argument. This is because the implicit premise is faulty. Aside from the meaning of 'benefit' and 'support' being unclear, we can't say conclusively what Y's opinion will be on 'whatever', since we cannot read their mind.

So this is really either a non-sequitur or a very weak syllogistic argument, not a new logically fallacy, sorry.

I'm not sure what a "moral fallacy" would be. Please define.