How do we stop this ripping off of our tax dollars?

My ex-sister in law, her sister and her best friend worked for a chain grocery store in their 20’s. All three found a way to claim disability once they had worked there for about 10 to 12 years. Each claimed carpel tunnel and found a doctor to substantiate this. All three have been able to get pain pill prescriptions for at least 20 to 25 years and all three are hooked on these pain killers. My ex-SIL can’t even get out of bed now. She takes the pills and sleeps all the time. Now the friend is having a quadruple by pass surgery this week. I can’t help but thinking if it hadn’t been so easy for these women to collect disabililty insurance they would have been a contributing member of society and much healthier. Of course, I feel the doctor was to blame also for playing along with this. How do we as tax payers blow the whistle on this kind of assistance abuse?