More on cellphones...

(T)he planned roll-out of hand geometry scanners in all New York City government agencies has sparked union cries of "geoslavery" and assertions that technology developed for security will be used to track, label and control workforces.
[...]
Biometrics expert Jim Wayman, who consults for the US, British and Australia governments, said mobile phones and credit cards were the "No. 1 enemies" for workers worried about geoslavery, not biometrics.

"There may be large forces at work in western society wishing to enslave the workforce. I want to acknowledge that fear..." Wayman, who has studied biometrics for more than two decades, told Reuters.

Yes folks, mobile phones and credit cards (which includes EFTPOS cards).

From an article here.