Some will argue that 1500hrs of light aircraft flying gives you "command experience and decision making abilities", which is invalid because flying a light aircraft isn't like flying an airliner, you're going to be waiting as an FO for a considerable amount of time and picking up your command judgement that way anyway, and there's been hundreds if not thousands of airline captains in Australia who didn't have that "required command experience" when they joined an airline and they're doing just fine.
The thing here is Jetstar is not doing this. They are hiring people like ex Rex Captains or FO's with 3000-10000hrs.
1500hrs on Cessna or Pipers or whatever wont get you a job there. Im not exactly sure where you would get a Airbus job with those hours either as a direct entry. Try Vietnam mabye.