Delta to Cut Wages 10 Percent  CHICAGO (Reuters) - Delta Air Lines Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=DAL.N target=/stocks/quickinfo/fullquote"&gt;DAL.N&lt;/A&gt; said on  Tuesday it will cut wages by 10 percent and its chief executive  will go unpaid for the rest of the year, but it still warned of  bankruptcy within weeks unless more cuts are made.