"As many have said, "prosecutorial discretion" can in no way be used to justify handing out work permits to illegals. That' actually doing something - not just looking the other way while illegals break laws."
And many are wrong, just like you and Cruz.
Immigration policy provides for work authorization for undocumented immigrants awaiting adjudication of their immigration status, and those granted deferral status:
Consideration of Deferred Action for Childhood Arrivals DACA USCIS
An undocumented immigrant is not 'illegal' until such time as a court of law has in fact determined the immigrant entered the country absent authorization, as all persons in the United States are entitled to due process of the law, including those undocumented; because all persons in the United States are presumed innocent until proven guilty, to withhold work authorization without a final determination of one's immigration status would be un-Constitutional.
That you 'think' or 'believe' that someone 'might' be in the United States absent authorization simply as a consequence of your unwarranted fear and hatred of Hispanics is not 'justification' to deny those undocumented their right to due process.