I guess a previous administration didn't follow that logic, according to the report. There is a link within the provided link (LA times?) but I have to pay for that service (which I won't). Here is the paragraph that references the link (in bold).
A federally backed task force and a safety equipment organization both recommended to the Obama administration that the stockpile be replenished with the 100 million masks used after the H1N1 outbreak.
Charles Johnson, president of the International Safety Equipment Association, said that advice was never heeded.
“Our association is unaware of any major effort to restore the stockpile to cover that drawdown,” he said.