Team Player
For a Direct Entry Captain on the B744 SIA is not a career airline, it is a Contract opportunity, three and possibly five years, possibly renewable. I appreciate that you mentioned A320 and B737 and I admire you for seeking such terms and conditions. As far as I am aware they currently don't exist in the Far East or Asia for the 744 and I think it is highly unlikely they will exist, in the near future, for the A320 or the B737. No harm in you going out there to seek them though, all strength to your elbow.
Please do tell us which airlines currently offer terms and conditions that are close to the ones you have detailed, we have done our research but, so far, have come up with a complete blank!