Fingerprint biometrics instead of ticket/ID

Security firm CLEAR has worked with Alaska Airlines to implement biometric identification of passengers willing to pay an annual fee of $245. Swiping fingers across a plate will replace a boarding pass and photo ID. The airline states that in their opinion 'Using biometrics as identification has a huge potential to simplify the travel experience and eliminate hassles'.
No word on what happens when someone decides to impersonate someone and hacks off their hand to use as identification.