I see exactly where FFF comes from that money shouldn't be your prime motivation, however I think that knowing all about airline pay progression is important from the outset - it's important to balance the huge cost in both training and lost salary against the benefits (both monetary and personal).
For abb911 we're possibly talking about him (her?) being well over £250,000 poorer over the next ten years, both in cost of training and lost salary.
That's one hell of a lot of money. If armed with all this knowledge, it still doesn't stop you, well that only goes to prove your personal motivation, which can only be a good thing.