The idea of such a boycott would be to cause damage to the markets and bring the government to its knees needing to save the economy from collapse.

The anonymous sources in the Haredi community have been threatening such movements for a long time already. I dont know if they have the power they think they have or if they think they have more power than they do, but a boycott like that could definitely do at least some damage.

That being said, I see some problems with this..

If they boycott all the big companies, what are they going to eat? they need to continue eating just like everyone else does.

And, if they think they buy enough that stopping the purchases would have a major effect, what is their alternative? they still have to spend money on food so they will spend it via other companies? This might hurt specific companies like Tnuva, Osem and Strauss, but how will it hurt the economy if they are still spending the same money just on other products?

How much of an affect can they have on the big companies? If you go into Haredi stores, a lot of what is sold is off brand products and not products from the more expensive bigger companies. Obviously this is not 100% as Tnuva and Tara dairy products are sold in Haredi stores as are Osem cereals and bamba and pasta etc, but a lot of of the products are from smaller companies anyway. I dont know numbers and how to compare what they buy from the large companies vs what everyone else buys from them and what they buy from smaller companies, but it might be a consideration.

Is it ok to hurt companies that have nothing to do with the draft issue in any way to hurt the government? It is not like Tnuva or Osem can turn around and say ok forget it, we wont draft the Haredim. It is not up to them and they have nothing to do with this.

I am not even sure what bringing the government to its knees on this issue looks like in this scenario. Strauss, for example, starts to suffer from lack of sales. The government sees the quarterly earnings report of Strauss and Tnuva dropping badly and the related stocks start dipping badly. What does the government do - go to the Haredi leadership and say we wont draft your boys just dont crash the markets? I just dont see this playing out like that. Do you see it as a realistic maneuver?