Billionaire John Kapoor is in prison for another half decade for bribing doctors to prescribe opioids. Another example is the Jeff Skilling who went to prison for 15 years for ripping off customers, employees and shareholders, most of whom were not rich people. I don't think your narrative accurately reflects the facts.
> Why should Bernie Madoff gone to jail then?! if some guy can steal a car then?
Fraud and tax fraud are different crimes, and even if they were the same the number of counts in Madoff's case would be vastly different.
In other words, you're much better off committing tax fraud than running a Ponzi scheme targeting rich people. Plus, I suspect that if Madoff had walked he would have died shortly thereafter in some freak accident or an apparent suicide .
I suspect, if the victims of his schemes had just been a bunch of plebes like us, then he would be sunning on the Riviera, right now.