Product shrinkage has been going on for a long time, but it does seem to have exploded under Obama. Producers use to be able to get by with temporary price hikes when their costs like fuel spiked , but they could lower them later on when fuel prices lowered again. That being said, they never lowered the prices to where they were before.
Under the Obama Regime , producers don't see their fuel costs going down like they did under previous administrations. They just keep going up and up, so they resort to smaller packages and slightly higher prices.