Earlier quoted context omitted.
Patent examiners are rated on office ACTIONS. Grants and denies both count as actions, although denials often take more effort (and complaints from the potential patentee).
I mean they're not rated on ACTIONS. They're rated on their PRODUCTION UNITS; of which an ALLOWANCE yields twice as many PRODUCTION UNITS than a REJECTION yields. So; clerk are incentivized to grant a patent as it takes less effort and yields more production units. If a patent is of poor quality and later is invalidated in a lawsuit; the clerk will not lose production units. Therefore; the clerk is incentivized to gr…
In fact, the most production units that can be obtained by a patent examiner for any particular patent is to issue a final rejection, get the patentee to ask for re-examination, reject again, and then have the patentee abandon the patent.