The £35,000 requirement is only for ILR applications for permanent residency, which you can qualify for after working on a Tier 2 visa for 5 years. So if you arrived in the UK in 2015, this won't apply to you until 2020... So you will have until 2020 to try to increase your earnings to the threshold amount (by then I think it will have increased to close to £38,000).
The £35,000 threshold for ILR was announced 4 or 5 years ago, and it was stated back then that it would come into effect from April 2016... So at the moment, it only affects people who entered the UK on Tier 2 in 2011 and are applying for ILR now.
Some Tier 2 visa holders will be exempt from the £35,000 salary requirement though - so it depends what conditions your visa was issued under.
Sent from my iPod touch using Tapatalk