[Vwdiesel] Control arm rubberbushing sleeve?

[Bud]

What the heck does that flimsy sleeve in the aft control arm bushing do? 
  I tore up one of the ends try ing to get it out.  It doesn't look like 
it does much as the sleeve and the bore through the bushing are much 
larger than the bolt that holds it all together.  I purchased a control 
arm kit with the bushings, bolts, ball joint nut retainer but no new 
sleeve.  Are you expected not to replace it?

Thanks
Bud

1985 Golf NA
http://www.rhinocat.com/cvaf4u/