Deflation benefits those who have a lot of capital and can invest it into ~ zero risk instruments like government bonds the most (e.g. that's basically how the rentier/aristocratic class in the 19th Britain were able to maintain their lifestyle without doing anything productive, government bonds were yielding 4-5% while the value of their capital was going up due to near continues deflation throughout much of the century).
On the other hand if you're a heavily mortgaged farmer you were basically screwed if the price food went down (that's why free-silver/loose monetary policy was so popular amongst farmers back in the 1800s in the Midwest and in much of US).
Deflation means that people's debt becomes more of a burden. I'd hazard to guess that poor people have more debt that rich, and so deflation would be worse for the poor.
And if you say "wages won't go down", then you're expecting that everything else goes down (including the price of whatever your employer makes), but your wages magically won't? It would be nice... but don't hold your breath.
However, no company is going to do that the other way around - if their revenues fall, they will either cut wages or fire people in order to still be profitable, so deflation should show up faster in loss of buying power too. Companies don't generally just accept lower profits, and shareholders especially do not accept this.