“Why, one wonders, don’t more business people speak out as loudly against the ideas of Bernie Sanders?”

Because a strike is less costly to a union than a lockout is to a buisness, Or better said, if a business speaks in favor of an anti-union position, the union is likey to come up with all sorts of impediments to productive work, up to and including a strike, any of which would cost the business money. But if a business were to retaliate with say a lockout or similar action, the result would still be lost production, which would cost them money. So no matter what the business does it will still cost them, So we are left with them funneling money to the Chamber of Commerce and similar idiot savants and pray their message gets through.

And “Public Employee Unions” are a stupid idea to begin with, for reasons which are all too obvious.