I feel that there are 4 groups who come under this topic,
1 These are the ones who want to show off and LOOK AT ME.
2 These are the ones who are getting the higher rates and they want to help those you are not getting it, to increase their turnover figures.
3 These are the ones who know how much can now be made from window cleaning, but they don't want anyone else to know, because the extra competition will spoil it for them, so they will keep very quite or bitch.
4 These just like to keep these sort of details between themselfs and the taxman, but the taxman might not be seeing the whole picture all the time.
5 These are the ones who believe that £6 front and back is a reasonable charge for a house.