Depending on when it was inflation could drive their costs up 3-5% over a year. When your margins are basically fixed by the govt at 12%, it makes sense to cover as much cost as they can.
The whole incentive structure is messed up because the govt "runs" defense companies like they are state owned without actually just making them state owned, or just letting them actually be private.
Tabloid quality article with clickbait headline. I would avoid this site.