Each nation and region has its own circumstances, and there is no one-size-fits-all solution. But we know that in countries which have successfully reduced inequality, progressive taxation has been an important tool, enabling governments to invest in good quality health care and education for their poorest citizens.
On the surface, Warner may not strike people as the most sympathetic non-violent criminal. After all, he is a billionaire, but he still committed a crime of greed according to prosecutors. On the other hand, he has no criminal record, has paid nearly a billion dollars in taxes throughout his lifetime, is philanthropic, and is not a threat to society.