Unpopular opinion here... I don't think the casinos should pay the employees during the shutdown.
Casinos pay employees to work, if they're not working why should they get paid? Casinos and most jobs don't care about the livelihoods of their employers, their main purpose is obviously to make money. They clearly won't be making money if they're not even open. Sure, they could continue paying their employees now and go bankrupt off the back of it. Or they could just not pay them and let the government step up to protect its tax payers.
An employer-employee relationship shouldn't mean you should suddenly start paying people to do nothing when shit hits the fan. If these people don't have their own savings then that's on them.
From the business ethics perspective, it is not acceptable to just getting rid of the loyal employees during the long lockdown. The unemployment rate climbed to the high levels since the 2008 worldwide financial crisis and everyone knows what kind of consequences will be actual in the near future. I don't know how big portion of the tax is fulfilled with the paid taxes of casinos but turnover of the casino has to be enough for giving bonuses as a part of salary to loyal employees.