Remember when lightning struck the Salt Lake City Mormon Temple a couple years ago, and the Angel Moroni fell off? Apparently, that's not the whole story; the whole temple nearly fell. They are now semi-secretly rebuilding it (they are calling it "renovations"), and the workers found a giant network of tunnels underneath the temple.
Start at 11:15 in this video: https://www.youtube.com/watch?v=YDf_ymNRk6E
I won't deny the possibility for it. That said, the volunteer program, farms, ranches & store houses etc... , the Church of Jesus Christ of latter day saints has built up & uses to serve communities & disaster relief without the threat of tax/theft/death is one of the largest in the world.
I have no idea how much it costs to keep the lights on & pay to make sure facilities remain open (likely not billions, though I have never looked at operational costs) though if you look at the Bishop's Storehouse program they run it will give you a better idea of the amount of service & resources they freely give to others outside of their membership from the donations of their members.
There is a tremendous education push as well from their church to help people all over the world learn practical skills & how to improve their lives regardless of their chosen faith (again not sure how much it costs to run these programs & it is likely not in the billions).
There is a general belief in this church that the Lord will clean out his house first. Many assume corruption like Romney (wolf in sheep's clothing type) style individuals in any leadership roles will be eliminated. As I gain more info & insight, I continue to see an expanded view of all Christian churches that have corruption within their ranks will be cleansed once the Great Awakening pushes all the corruption into the light of day.
End of the day I think we can agree the anywhere "power & authority" is perceived, there is an easy avenue for corrupt individuals to take advantage of that system no matter where that is located & it is up to individuals to keep the organizations they choose to affiliate with in check & expose corruption anywhere it is found.
Ultimately I believe we all need to search for truth & find it anywhere we can, which is one of the tenants taught to the youth when I was young. It continues to boggle my mind that at least the great majority of the membership are not active conspiracy researchers, especially when one of the core tenants of their scriptures spells out that secret combinations/societies take blood oaths & focus on enslaving/destroying their fellow man.
I'm sure there are many really good people who are Latter Day Saints, just as there are many good people in other religious organizations. They're not the ones that should be held accountable. It is the high up leadership, just like in other large religions. Huge corruption by them is not out of the question.