I don't think it's wise to go with any airline paying new hires a bonus. It's temporary, and a slap in the face to those who came before and never got such. I think the standard should be a percentage raise across the board, with perhaps a bump for first year FO pay to entice new hires. At least then everyone benefits, and it doesn't just end when the bonus expires. In fact, I told two different potential employers that I would either not accept their bonus, or just take it and put it in savings for the interest, then give it back with a 2-week notice to vacate (since most come with a serious time commitment). But that's just me.

Now, I think a performance or safety bonus for ALL employees is a great thing.