Meddling MIL!

I am so very frustrated by my MIL and her CONTINUOUS meddling ways and my husband not doing anything about it.  Anybody else had these issues?  My husband and I have been married 12 years and she has ALWAYS been this way, but I guess as I have gotten older it irritates me to no end!  She like REALLY meddles too.  She does stuff like she lives in a very small and "informal" town (I live 30 miles away in a larger town, thank God) but she can call the power company and ask how much her power bill will be each month, before the bill arrives, and she also asks how much her three children's bills are that live in that town.  THEN, she doesn't do this as a "favor" to them, to let them know, but rather she tells everyone else in the family (very big family) how her bill was so low (her house is an OVEN, she never runs the AC) and she talks about how much "so and so's" bill is and she wonders why theirs is so high, etc.  Rarely is anything her children's "fault" either, it's always the spouse.  Like her one son, his power bill was quite high this month (she always tells me about it) but it's not his fault of course, it's his wife's fault.  

She does so much talking about people and backstabbing that since it's such a large family someone is always mad at someone else and there is ALWAYS drama!

So anyways, my husband has his own business.  He works two of his brothers when he can.  Well one of the brothers is quite experienced and can basically do the job with little direction and the other one basically is just labor, you point and supervise him and he can do it, but doesn't really have a lot of "knowledge" on it quite yet.  So, my husband pays them different amounts due to that.  Well brother A, the higher paid one, worked this week for my hubby and my MIL asked my husband how much she pays him per hour and he told her.  Well the brother B, the lowest paid one, lives with her, so she already knew how much he made.  Well, she went and told brother B how much brother A was making and now Brother B is mad at my husband and doesn't even want to work for him anymore and we NEEDED him to work.

My husband is irritated at his mother and I told him that he SHOULD NOT let her get involved in his business, how much he pays help, etc.  On ANY job the more experienced person gets the most money.  The brother A can basically run the job without my husband there, so why would he not deserve to make more, but why should my husband have to explain this to brother B?  My husband said it is "disrespectful" if he were to tell his mother it is none of her business when she asked about pay and such, but I do not totally agree, because it is, in fact, NONE of her business.  I told him he should say something like "Mom, please let me handle my business and how much I pay people, you don't worry about stuff like that" but he still says that is rude. 

So, have any of you every confronted a meddling mother in law and did it turn out okay, cause I'm about ready to strangle her.  There is TONS of stuff she does, that's just "this week's" drama!