As has been said, we pay for food, Tea & Coffee as per long standing agreement. Removal may amount to a breech of contract, yet to be tested.
With security as it is (not being able to take a sealed cup a soup through because "it is designed to be turned into a liquid") we are limited to what we can take through on our own now, although others do manage perfectly well.
If the company was in jeopardy there are very few who would not do whatever was necessary to help reduce costs. But we are still making an annual profit and with the bonus culture someone will get a nice reward should they be able to remove crew food &/or tea and coffee.
Additionally the management still enjoy their "perk" of subsidised food and drink at their in house cafe, is there talk of that being under threat....didn't think so!!
Save money to ensure company survival and jobs= Yes ....... reward some manager with a nice fat bonus by doing so = No way.