grist for (one's) (or the) mill

'The Haves and the Have-Nots'

By BRANKO MILANOVIC
Reviewed by CATHERINE RAMPELL

"Anna Karenina," Manchester United and Nero are all grist for this analysis of global inequality


(grĭst)
n.

1. Grain or a quantity of grain for grinding.
2. Ground grain.

idiom:

grist for (one's) (or the) mill

1. Something that can be used to advantage.

[Middle English, from Old English grīst.]