Dear Shri Nara,
Not all the people who flock to the godmen/godwomen (gm/gw) are fools, as rajprasad brackets all. I believe that as soon as a certain gm/gw is able to attract a certain critical mass of following, a coterie forms around him/her. From then onwards, it is this coterie's business to organize and manage the gm/gw show and the latter becomes a mere puppet dancing to the coterie's set tunes. It is only the outer circle of devotees who are gullible beyond correction.
There is reason to suspect that in most cases of gm/gw this coterie has or develops links with drug-, arms-, building-, real estate-, etc. mafias and it is this linkage which is behind the unbelievably huge amassing of wealth, cash, gold etc., as also patronisation by politicians, aspiring as well as established. In effect the gm/gw becomes a contact and his establishment, a clearing house for various vested interests. And what will normally attract the suspicion of enforcement authorities, becomes a completely blessed congregation beyond any doubt whatsoever.
The two facilities provided by the establishment of the gm/gw (which will usually have more than 5-star comforts) viz., providing a contact point, facilitating financial transactions like a clearing house and ensuring safety from the prying eyes of the law-enforcement authorities, brings a lot of moolah for the coterie (gm/gw) in return. In order to hoodwink the gullible following, some crores will be spent on a hospital with state of the art technology and facilities, then a medical college attached, other educational institutions and so on. The expenditure on setting up these various outfit, which will be an astronomical sum for the common man, is but a small part of the enormous profits of the gm/gw financial empire. The recurring expenses will almost always be generated by these different units and the "empire" spends only on capital outlays. The followers assiduously justify and glorify the gm/gw saying, see how much public benefit is being done by that selfless gm/gw? Only perverted and sinful minds will find any fault with such avataars (and those people will surely be roasted in hell-fire till the end of time).
Since the godman/godwoman business has become somewhat stereo-typed nowadays, we will find more and more entrepreneurial interest in this line, in future too, imho.