This was indeed one of China's tricks to economic rise. Turkey is trying to emulate the same. You debase your currency and make the population more poor than they need to be without a direct pay cut. This will make your exports more competitive automatically because the population is willing to work for less (in real terms). You'll hope that this will in the long terms establish supply chains and industrial base efficiencies that will not move away from your shores when the income level eventually increases.
Authoritarian governments that do not care for reelection can do this more easily than democratic countries. Indian rupee is also over valued in my opinion
GDP in PPP terms do not give you bragging rights in international comparison. Most people in public forums such as these discuss about GDP and per capita just to brag