The term "Diggers" historically refers to "The True Levellers" - 17th-century radical Christian agrarian group that fought against the English establishment and believed the earth was a "common treasury" for all.

See also; edited liquor bottle image referencing the Eagles' "Hotel California" ("We haven't had that spirit here since 1969"). Pop culture reference

Their peer group the "Ranters" can perhaps be tied into another Tom Cruise film, the one directed by that A Clockwork Orange director.

That's assuming we agree on the Winstanley take on Ranter principles as amounting to the excessive enjoyment of "meat, drinke, pleasures, and women".