What's important to keep in mind I think is, this is supernumerary to the compensation, the total compensation, that a screening officer receives from their employer in the course of their duties. There is already a compensation package at all the airports, so there are hourly pay rates, benefits, pensions, holidays, sick days—paid sick days—that the screening officers are entitled to.
This offer was never meant to be mandatory for 12 weeks. It is an incentive above and beyond their existing compensation, their existing pay schedule and overtime rates. It's above that and it's available to those who are able to avail themselves of it.
We fully expected that most screening officers would not be able to take 100% advantage of it, because people get sick and they go on vacation, and that's perfectly acceptable. However, if you show up for your scheduled shifts, you have an opportunity to earn additional funds above what you're already entitled to.