In the former of these two, improvements in wages have been won by workers. The tactics of Social Movement Unionism have been utilized, insofar as the campaign organizers have worked closely with, for example, The East London Citizens Organisation (TELCO), which has brought in members of faith groups and other trade union branches. However, there remain concerns about the T&G's commitment to rank and file workers' action, considering how the union acted during the Gate Gourmet strike. Advantages Heery, Simms, Simpson, Delbridge, and Salmon assert that the organizing model has several key advantages that distinguish it from the servicing model, such as the fact that the organizing model promotes "systematic", proactive, and well-thought out campaigns, which help the union's goals get satisfactorily and pragmatically achieved. More broadly, one of the obvious advantages of the organizing model is that it allows workers to actually be involved in the campaigns that most closely affect them, promoting both equity and equality. In addition, the organizing model, as opposed to the servicing model, provides for the union's future by broadening its support from the workers and giving them a sense of investment into the day-to-day functions of the union itself. Bob Carter and Rae Cooper, in their research about British trade unions and their use of the organizing model, state that, within the unions themselves, there was praise for the organizing model because it upheld the "...core role of trade unions". This is to say that the British union members felt the organizing model adhered to what unions should be doing in regard to their members. Disadvantages Practical disadvantages Heery, Simms, Simpson, Delbridge, and Salmon list several disadvantages of the union organizing model, with the most critical being that the model is very "resource-intensive", in terms of both people and money. Since the organizing model is, at its core, about people, rather than services, it cannot be effective without people to both implement it and carry it out. Heery, Simms, Simpson, Delbridge, and Salmon talk about "...instances of a lack of support or even opposition to organizing within unions." Because the organizing model is so dependent upon worker motivation and action, if the workers themselves oppose the implementation of the organizing model, it cannot be effective. Fletcher and Hurd suggest that even if members are not resistant to adoption of the organizing model, they still have to learn how to perform tasks previously handled