I read this discussion and thought it is only about idiom but then I searched about 'so as to' and found something interesting by Ron on this forum. But that something interesting made me confused a bit.
Anyhow, here are the two links from where I will quoting what Ron says about 'so as to'
so-as-to-t16381.htmlpost58403.html"so as to..." is certainly a legitimate construction, but you have to know how to use it.
since it isn't followed by a whole clause -- it's just followed by a verb in infinitive form -- the subject of that infinitive verb must be the same as the subject of the preceding part. for instance, if i say i bought a bunch of blankets so as to avoid paying too much for heating bills, then that makes sense, because i (the preceding subject) am the one who is going to avoid paying too much for heat.
Now, if I consider the following example
She drank coffee so as to stay awake. This example makes perfect sense to me according to the above stated rules by Ron.
Now, lets move to another example from the above given links,
Congress is debating a bill requiring certain employers to provide workers with unpaid leave so as to care for sick or newborn children. => INCORRECT
In the explanation to the above incorrect example, Ron says,
this is a whole different issue. in the construction "so as to", there is no change of subject, and so there's an implication that the subject is the same as the subject of the previous clause/action.
that's a big issue here, because the only subjects of actions in the previous clauses are "congress" and "certain employers". therefore, the sentence is implying that one of these two entities is actually going to care for sick or newborn children! not good.
in this sentence, "so as to" doesn't work, because "workers" (the people who actually have to care for the children) isn't the preceding subject.
according to this sentence -- depending on how you process it -- either congress or the employers would be the ones taking care of the children. that doesn't make sense.
Well up-to this point I am very much clear.
Now, lets move to the example in the very first post in this thread, i.e. the example that made me bit confused.
"Faced with the recurrence of natural disasters, such as floods and wildfires, many state governments have imposed significant taxes on their citizens SO AS TO prepare for the next calamity." From the above stated rule by Ron, i.e. the subject of that infinitive verb must be the same as the subject of the preceding part.
Case 1 - Here, isn't it clear that the subject of the infinitive verb (prepare) is state governments? That is state government is preparing for next calamity because that is what the role of government to be ready. If it is so, then why it is considered wrong?
Case 2 - OMG!! when I've typed this much, a new thought just struck me. Now let me represent these as case 1 and case 2. There is ambiguity on "who is preparing for the next calamity" is it 'state government' or 'citizens'? Is this the reason why this example is considered wrong?
Please confirm, which case is right? If both are wrong, please explain a bit more on this issue.
Thank you for your patience and really sorry for such a long post.
I Can. I Will.