she doesn't recall all the little forms she filled out with this kind of stuff. Maybe she convinced herself she never did this, or this much, or for this long - that she's in denial about it all.

*EDIT*

OR..she remembers it all, and couldn't bring herself to admit to trying to win extra points in this way for so long. Maybe it's better to play it off like you forgot what you had been doing for so many years than to admit you absolutely knew the whole time. And just hope that your political enemies don't manage to dig very much of it up.