I'd love to tell you more about pay increases etc but all the agencies are dickless wonders and won't ask AJX for more money lest they upset their lords and masters. Meanwhile, if the pay doesn't look good to you, don't join, because it won't be going up with the current personnel involved in the contract agencies.
Don't forget the brown nosing koolaid drinkers that every time someone mentions "pay" they react as if you just mentioned their mother...!