Any security to protect someone from just stealing your eye in a parking lot...? One or two of these events on the news would quickly sink this.
And I speculated on the possibility of Iris generation a while ago, the research is fairly solid - you just need to fool the device into thinking it’s scanning a human eye instead of a display.
"Lets just take their <eye/finger/hand/head> with us to get into the <base/facility/lab>".