Why? I bought my house 4 months ago, I earn quite a bit less than the average, I still have money to go away for the weekend and live a very nice life at the moment.
If you're committed to buying it's ok, I put down 15% and it's easily possible to save that much - people just get distracted going on holidays all the time, buying the latest gadget etc. Made even easier when you only need a 5% deposit now.