That does not always imply that the Turkish Central Bank is doing it because of his reasons, but Erdogan is remarkably like Netanyahu in that he knows well what is going to work on his audience, and at that time, this did.
sigh
And Turkey needs higher rates. The rate has been far below the natural rate for way too long. In capital markets, you saw Turkish companies make all these crazy acquisitions (in addition, to being forced by the govt into splashy infrastructure projects in areas that supported the govt)...the bust from this will be incredible (the only leverage Turkey has is that French/German banks are neck deep in this debt). Lowering rates is just prolonging the inevitable (the majority of Turkey's corporate sector is already functionally insolvent).