Może Ci się przyda:
https://www.collinsdictionary.com/dictionary/english/purchas...
http://tinyurl.com/llxkwkt

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Note added at 2 hrs (2017-04-13 13:28:57 GMT)
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Również, jeśli kontekst pozwala:
"political prostitution "

Political prostitution may be defined as the "offering of one’s services or power for a corrupt use, for the sake of personal or financial gain". Thus, politicians who engage in selling their influence and power in an effort to secure personal achievements and gains can be considered Political Prostitutes.
http://tobagojustice.blogspot.com/2012/11/ashworth-jack-poli...

As indicated on the pages devoted to political corruption, efforts have been made in recent years by the international community to encourage countries to dissociate and incriminate as separate offences, active and passive bribery. From a legal point of view, active bribery can be defined for instance as the promising, offering or giving by any person, directly or indirectly, of any undue advantage [to any public official], for himself or herself or for anyone else, for him or her to act or refrain from acting in the exercise of his or her functions. (article 2 of the Criminal Law Convention on Corruption (ETS 173) of the Council of Europe). Passive bribery can be defined as the request or receipt [by any public official], directly or indirectly, of any undue advantage, for himself or herself or for anyone else, or the acceptance of an offer or a promise of such an advantage, to act or refrain from acting in the exercise of his or her functions (article 3 of the Criminal Law Convention on Corruption (ETS 173)

https://en.wikipedia.org/wiki/Bribery

Passive bribery
Passive bribery includes the offence committed by the official who receives or accepts the bribe [8] . In the example with “Company A” the doctor who receives or accepts the bribe commits to passive bribery. It is though important to note that it is often the person who receives the bribe who demanded it in the first place. So it is often the passive party who are more “active” in the transaction [9] . Persons ask for bribes because they know that they have a position where they can be deciding and influencing in things and then benefit more of their position.

https://bribery.wikispaces.com/active bribery  passive bribe...

Demand Side/Passive Bribery

Demand side or passive bribery entails an individual or entity asking for or accepting an advantage in return for acting or not acting in relation to one’s official duties.

A typical form of demand side bribery is the denial of goods or services.

http://www.business-anti-corruption.com/corruption-dictionar...

The key offences set out in the Bribery Act 2010 are:

Section 1 – offering a bribe (active bribery);
Section 2 – receiving a bribe (passive bribery);

http://www.lexology.com/library/detail.aspx?g=0de169f3-74b5-...