You do not need to 'buy' a job. If it is a 'jet' job then you may have to pay for your TR. If you are prepared to look at other options ie Turboprops, Air Charter and Biz Props/Jets then you dont need to buy your way into them. 500 - 1000 hours instructing will open many doors. 2 years as a TP FO and you will be promoted to left hand seat. You will be earning at least 45k a year. Dont be blinkered and assume the only way into aviation is through some sort of "pay millions of pounds" and buy your way into easyjet or Thomas Cook or whoever. There are those who are utterly desperate and seem to have a very blinkered view on the job front. There are other options out there!!
The other point however is - you've got to be mad to spend money on pilot training for the forseeable future. The industry is going into decline.