On the lighter side
In other words, we can say that this word can used to address journalists who report "Paid News".
We have three pillars of Democracy. Legislative, Judiciary and Executive. In view of above mentioned definition of Presstitute, Laws can also be made to specifically favour some corporate. Biased and predetermined Judgement can also be passed. And, it is better that we talk lesser of Executive because we all know the meaning of the word Bribe.
As per the information available on internet, the word Juristitute does exist. On similar lines, other words can also be coined such as "Executitute" and "Legislatitutes" (Since Law making is a collective effort, therefore, it has to be a Plural).
Now, let loose our horses of humour and vent off our frustration. But, no personal comments on anyone PLEASE. more