Tech crew feel they have a right to the f & b on the plane and they are not wrong. It's the way they asked for the f&b from the cc that's important to the cc. If they ask nicely I don't think the cc would begrudge them.However,some tc feel that cc are employed to serve them and they are not obliged to be nice.This is where the problem lies.
Some capts I knew were very nice and diplomatic when requesting for f&b and I have seen cc serving them caviar,lemon honey water, food in first class even b4 paxs etc.
On the other hand,I had also experienced capts who were demanding and felt that being capts they were entitled to anything on the plane and treated cc like servants. Results? CC got no choice but to serve them but with bitterness.
The lesson here is capts or tc should made every effort to get along with cc and things will improve.
Legend: cc = cabin crew, tc = tech crew, f&b = food and beverage,pax = passenger.
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Stewardess Gloria's blog here