Stable the steps are a bit of a mystery, they aren't published anywhere.
To clarify, every year the following may occur;
1) A step increase is awarded
2) The overall scale is increased
3) Combination of 1+2
4) No increase or step
When you get your command you jump 10 steps, however bare in mind the time to upgrade for new joiners now will be similar to most legacy carriers.
In general a step only will never match inflation, hence the comments about wage erosion. I just did the budget for 2014/15 and even with two incomes the rapidly increasing cost of living here is really starting to hurt. If you are currently on the Airbus you may be offered direct entry 380 which is a great gig in terms of lifestyle/rosters.
Feel free to pm if you want more info.