500 hours and a one year contract in Jakarta would just about be bearable but 4 years would not be fun. Although at least you would have 4000+ hours upon leaving.
The missus wouldn't be best pleased with living there for 4 years either.
I suppose it's a way to entice p2f FOs to stay with Lion Air and not jump ship after a year and a bit?
I just wish there were some other programs in the far East apart from Jakarta.