In CA, the "work-share" program permits for the payment of unemployment insurance benefits to workers whose wages and hours have been reduced. The program is considered a temporary and practical alternative to layoffs. However, it is a voluntary program in which an employer may or may not participate (an employer must also meet certain requirements to be eligible). The fact is that, an employer can impose a reduced work schedule or most any other requirement if your employment is "at will".  And most employment relationships are.  Unfortunately, without some other "underemployment" benefit, you can choose either to work for your current employer or not, or  find a temporary part-time job.  Exceptions to "at will" employment may be found in an employment contract (or a union agreement), if one exists, or this action goes against company policy, or came about due to some form of discrimination.  Otherwise, your employer's action is legally permissible.