They are working, but none of the solutions are popular. Here's the scenario from a layman's perspective, and those of you better versed in economics are free to correct me wherever you feel necessary:
1. Pakistan imports a lot more than it exports (resulting in a current account deficit). So how do you reduce the CAD?
Reduce imports and increase exports. Devaluing the rupee helps with increasing exports and reducing imports, but you also have inflation. Additionally, you don't just have exporters 'sitting around', it's going to take time for increased orders to come in and be fulfilled and the results seen. The majority of the increase in exports is also going to be from established industry like textiles etc, and this is where you run into another bottleneck - the narrow industrial base of exportable products in Pakistan. Diversification of the industrial base will take years, perhaps a decade or two, provided the correct policies are put in place.
2. Revenue shortfall. We are all aware of the issues with revenue collection in Pakistan - most Pakistanis don't pay direct taxes. IK is frustrated enough to have threatened to disband the FBR, but there are no good solutions in terms of what would be done next if that threat was carried out. The reduction in imports that is necessary to curb the CAD mentioned above also has an impact on revenue collection because you lose the revenue from duties/taxes imposed on imports.
So, the core of the problem, as I see it, is revenue generation, and to generate revenue you need the domestic industrial base to expand which is a long term process. So in the interim, the need to reduce the CAD results in going to lenders such as the IMF, who obviously want their money back and want to see revenue generation increased so the government is left with limited options such as increasing the prices of gas, electricity, fuel, cutting development funding etc.
None of this is a situation the PTI created, and the PTI is correct in pointing out that it inherited problems that have no quick fix, and will require a lot of pain to address.