What is society's interest in a backlog of criminal cases?

In Barker v. Wingo, Powell J. pointed out that, apart from the interests of the accused, society has an interest in the accused being tried promptly because a backlog of cases enables accused persons “to negotiate more effectively for pleas of guilty to lesser offences and otherwise manipulate the system” [p. 519], “persons released on bond for lengthy periods awaiting trial have an opportunity to commit other crimes” [p. 519], the longer an accused is free awaiting trial “the more tempting becomes his opportunity to jump bail and escape” [p. 520], “delay between arrest and punishment may have a detrimental effect on rehabilitation” [p. 520] and the longer an accused is free awaiting trial the longer he is “disadvantaged by restraints on his liberty and by living under a cloud of anxiety, suspicion, and often hostility” [p. 533].