Yes, and as a result, the US government contracted a company to develop a machine to be able to create 1.5 million masks per day. Instead of having a stockpile, which itself is not a guarantee of having enough masks, this seems to be the logical path forward. Meaning that those warnings in 2013 and 2014 were heeded and acted on by creating this contract in 2015 (and apparently they contracted two separate companies).

Perhaps you misinterpreted the term respirator to not mean mask?