Leaving a decent job in a legacy airline just to get a quicker command in a low cost is foolhardy in the extreme. The locos vary significantly in pay, not just from each other, but most from base to base, so you often won't get what you expect, and it'll almost certainly be similar to what you already earn, if not less. Then there are all the other trimmings, like medical, licence, uniform and food, training costs, pensions (those locos that employ you properly often only match contributions, so you have to pay some of the salary in first, those who use contracts will give you nothing)... So, more responsibility, more hours, crappier airports, and all for less money. While I can appreciate that command has its attractions, that is purely an ego thing - look at the working conditions, work rate, location, job security and renumeration; forget about the ego smoothing of type and seat.