Additional changes came with the passage of the War Labor Disputes Act (WLDA) on June 25, 1943. Enacted over Roosevelt's veto after 400,000 coal miners, their wages significantly lower due to high wartime inflation, struck for a $2-a-day wage increase, the legislation (in part) required the NLRB to issue a ballot outlining all the collective bargaining proposals and counter-proposals, wait 30 days, and then hold a strike vote. The War Labor Disputes Act proved very burdensome. The NLRB processed 2,000 WLDA cases from 1943 to the end of 1945, of which 500 were strike votes. The act's strike vote procedures did little to stop strikes, however, and Millis feared unions were using the referendums to whip up pro-strike feelings among their members. Millis also believed the law's strike vote process permitted more strikes to occur than the NLRB would have allowed under its old procedures. There were so many strike vote filings in the six months after the war ended that NLRB actually shut down its long-distance telephone lines, cancelled all out of town travel, suspended all public hearings, and suspended all other business to accommodate the workload. By early 1945, Millis was in ill health. He resigned from the NLRB on June 7, 1945, and Paul M. Herzog was named his successor.