Hi there
We are moving over end of may on a 457. The job is a permanent one but for timescale etc this visa was best option. We will apply for PR once there. My husband has looked into this and had advise.....we deffo have to pay the higher rate as you are not classed as a resident. We are only on a temp working visas ( thats what the 457 is) regardless of however long your job lasts. Its crap i know, so once there, if your going to stay apply for PR !!!!! Hope this helps,
Emma