Although it's awful that some successful casino owners and management forget to protect and help their employees who helped them to become successful, some casino owners were able to send help and give their employees the salary they need. Perhaps they don't care about their employees' financial struggle because they have a lot of money, and they can survive the whole lockdown with that money.
If the casino is able to provide the salary then it is well and good asking them to take care of their financial struggles is a tough ask, the lock down and the virus spread will lead to a financial crisis and that will affect their business and these casino owners have to be prepared for those situation too.
It's their responsibility to give them a salary even if the business is closed. They should be prepared in times like this, and for sure they have an emergency fund to provide their employees. It's only a simple sacrifice for the employees who have been working for them every day.
No one expected a complete lock down in the wildest dreams to be prepared for a situation like this and hence you cannot blame anyone for this situation.