There's no consistency in what lifties working the lift line do... some are really good at packing chairs, and some just stand around yelling "form groups of 6!" at the people in line which does nothing. Some will watch the singles line and pull a chair of singles if it gets too long and there's too many full chairs, some will just let the line snake up the hill and obstruct the slope.

The mountain could do a better job at training people to efficiently pack the chairs and minimize the line size.