That may be cold comfort for the many import-reliant businesses that have gone to the wall as a result of the rial’s recent plunge of 40% against the dollar [...]
To be put aside or forgotten.
To take an extreme and determined position or measure
Usage notes
In the meaning, "to make an all-out effort", go to the wall is used with for(“on behalf of”) and on(“about"," concerning”) and other synonymous prepositions.