State policy shifted to support the new, imperial view of the seas, where they needed as vital, stable conduits to the far-reaching outposts of developing empires. Piracy was far too unstable a variable -- and it was also far less necessary to England as the Royal Navy had increased in size threefold in the time of Cromwell, and the growing English East India Company was proving adept at arming its own vessels.
A document that clearly illustrates the shifting state of affairs is posted below: "Proclamation for the more Effectual Reducing and Suppressing of Pirates and Privateers in America" [1688]. A version with modern spelling and type can be viewed at
https://quod.lib.umich.edu/cgi/t/text/pageviewer-idx?cc=eebo;c=eebo;idno=a46576.0001.001;page=root;view=text