Is greed over meat is more unwholesome compare to greed over non-meat dishes? Meat is non-living thing, greed is greed, they're the same. Many studies have shown that meat consumption involve in far greater number of killing compare to non-meat diet. More meat means more supply therefore more killing. So is it true greed over meat is more unwholesome?
It's a highly subjective question. Someone might desire the taste of a vegetable curry more than a meat curry. Someone might desire the taste of chocolate or ice-cream more than the taste of meat. Someone might desire liquor consumption more than meat. It has nothing to do with the number of animals killed.
On the other hand, eating meat does not require desire. Even enlightened beings consume meat. Unwholesomeness comes when you desire or dislike the taste or start worrying about whether you are responsible for the dead animal.
Non-Theravada answer -
Greed is unwholesome. Meat dish is more unwholesome than non-meat, simply, meat dish involved killing. Where can the meat be coming from without killing? "
Meat is non-living thing...", a well-developed mind might be able to tell you this is not really true... at least meat is coming from once living being, right? [Hey, do you ever wonder why meat spelled as me + eat?? In Chinese it's written as 肉, a combination of two characters, 人(human/man) + 內(inside)?!].
You are right, meat consumption means more killing. A person who cultivates compassion will feel saddened when passing by the market at the butcher's stall, those meats hanging on hooks in blood red, the sharp knife cutting across the tissues... for this very realization the meat no long taste the same.
How do you feel when a Bhante after chewing the chicken breast tearing the flesh from the legs, with this very same hands and mouth, gives talk to the lay-people, flipping the Sutta, quoting,
One is not called noble who harms living beings. By not harming living beings one is called noble. -- Dhammapada, verse 270
All tremble at violence; all fear death. Putting oneself in the place of another, one should not kill nor cause another to kill. -- Dhammapada, verse 129
In non-Theravada tradition, non-meat dish is praised; all the Chinese Mahayana monasteries served only vegetarian dishes. Detailed explanation in this post. If lay-people taking a Bhiksu out for meal, automatically we will go to vegetarian restaurant, to show him respect.
There are sayings of the Buddha eating meat, or his last meal was pork therefore due to food poisoning he died. One should understand its only the Theravadin interpretation. In Mahayana Sutra, the Chinese translation of Sukara-maddava is 樹耳 (tree mushroom/ truffle) since antiquity, the food in the last meal of the Buddha.
It all comes down to the intentions of the individual who is eating the meat. Many cittas happen in any one moment so there can be more than one intention while eating meat and they can be wholesome, neutral or unwholesome.
-There could be greed for craving the meat, any food or anything.
-There could be greed for supporting someone else's unwholesome actions.
-Whether or not there is greed could depend on what the individual believes deep in the subconscious.
-Whether or not there is greed could depend on the instincts about how the individual relates to others.
I would say that usually meat involves a bigger desire = less wholesome than eating non-meat food
I will not even address the moral aspect of killing as being much worse than other stuff cause i dont want to say something im not sure of
its more clear this day and age that consuming meat involves killing - that you dont need to eat it for health - that it causes bad effects to the environment
now in a decision to eat something you have a lot of elements into it wholesome and un-wholsome ... like maybe not to offend the host etc - in the past people might have thought they need it for their health which we know is not the case today etc
but really if you are in the supermarket and you can buy a chocolate to snack on - its pretty clear its not wholesome and its out of greed instead of choosing something to eat purely for nutrition ... if you buy an expensive chocalte that harms your health a litte and your money which you could have used for better purposes
to buy a more expensive food is less wholesome cause it will involve usually more greed - unless for example its a healthier food
To give up on tastier foods for other more wholesome purposes (saving money- being healthier - prevent the death of animals - not harm the environment etc) .... is good kamma
How bad kamma wise it is to fund the killing of animals (and more accurately making someone get the bad kamma of killing animals) in comparison to buying something overly expensive for taste is im not sure - but i do think you can say this day and age most people buying meat will be something with a good percentage of akosala intentions