Unpaid Leave
Unpaid leave probably cannot be forced on employees. But what a company could do is ask employees to take unpaid leave with an undertaking to repay the lost salary at a future date - for example when the next profit is declared (which I'm sure for a company like CPA won't be too far in th future) - ahead of shareholders' dividend. So effectively it would actually not be unpaid leave but it would be like a loan by the employees to help the company in a difficult time - a win win for both parties.