Why do stars use backup dancers?

[Orbital-Fetus]

on the low, i think it's because it's a visual cue that other people
are literally following them in this complex series of body movements.
that's why you follow them with dumb ass ideas they have and shame on you for that.

backup dancers need to start snuffin out the lead performers on stage.

 

[Rhapscallion Démone]

backup dancers need to start snuffin out the lead performers on stage.

How will they get paid?

 

[Double Burger With Cheese]

Backup dancers should be called Background dancers because technically they starters, not backups