Animal Welfare Groups Combine

It is my belief that all of these organizations are working for the same cause - to protect the animals of the world.  I think it would be more cost efficient and more operational efficient to combine their efforts.  Each of these groups asks for contributions.  By combining the groups, I believe the cost of operation would go down.  Office expenses would be cut; fundraising costs would go down.  Each of these organizations ask the same people for support.  If combined, there would be one fundraising effort which would save on paper, postage and staff time to do the work.