The events of the last week are just what happens when a company decides to refuse to meet its customers in the marketplace of sane ideas.
You could probably have gotten away with what UNH did if the money wasn't so ridiculous. Thompson himself had a compensation package worth $10.2 million[0] a year. It's reasonable to think that other c-suiters at the company, along with those of its parent organization, made similar amounts of money.
The company also has a 1.53% dividend yield[1].
The average American's lifetime earnings are $1.8 million for men, and $1.1 million for women[2]. That is to say, within five years, Mr. Thompson would likely have made ten times the average American's lifetime economic output, post-tax.
If you're paying a significant chunk of your yearly earnings to be covered by UNH, you expect the money you paid to go towards providing you with service. Instead, tens of millions of it goes towards a handful of individuals, and regardless of how the company does financially, participants in the equities market will get some of your money, and you'll possibly be denied the service you paid for in order to make that happen.
People will say that this is necessary to remain competitive, but it just isn't. People with severe health problems or loved ones with severe health problems aren't asking these executives or shareholders to live like paupers; they just expect the service they paid for. When there's something as life-ruining as chronic health conditions dogging you every single day, there's a chance you snap, and in the US, there's fairly trivial access to tools to help you do that.
[0] https://www.msn.com/en-in/health/health-news/the-salary-bonu...
[1] https://www.nasdaq.com/market-activity/stocks/unh/dividend-h...
[2] https://www.theknowlesgroup.org/blog/average-american-lifeti...