buy and pay for

Etymology
In the sense "bribe, corrupt", the verb is much rarer than and is probably a back-formation from the adjective.

Verb

 * 1) To bribe or corrupt with money from special interests; to obtain by bribery.
 * 1) To bribe or corrupt with money from special interests; to obtain by bribery.

Usage notes
As an idiom, this is almost always used in the past tense "bought and paid for"