A. Low pay.
B. Our nation is generally more corrupt and are in constant race of leaving each other behind, which leads to such desperate measures.
C. Be in place of fixer for a moment. You got family to feed, their school fees are pending. Beaconhouse is taking 40k a month (but it should be okay for you people because its easy to condemn a fixer while sitting on chair). The first things girls question about these days when you date (or their parents if you go out for arranged one) is their financial backing. You're really passionate about cricket but its slightly reduced after breaking into international cricket and its just another day for you now. Game is good and you really want to perform for your team but not at the cost of your life. Game stays on for 15-20-25 years, life goes way beyond that. You desperately need to make quick bucks. Yes you already got 50-60 lacs with you but for a sports celeb its not enough. A single fine can take it out. And then you see your good'ol friend/bestie is worried about you and all of a sudden he puts up an option of stopping couple of balls intentionally or bowling few balls poorly for quick bucks, just that. You got remaining 49 overs to bat or 9 overs to bowl, right? You can make things happen for the time in rest overs, sure. Amir did that. He took a 5-fer in Lords, hasn't he? You just need to manage an over out of you game and everything stays intact. All the glory and stuff. And you'll be rich in no time. You wont have to drag yourself everyday out for work. Good career for kids, wife will be much happier after getting all the fancy stuff out there. Your post-retirement life will be a breeze. Just manage out a fixed over, even couple of balls? How many of you would refuse that?