McGuinty government had promised to close all coal-burning plants by 2007, Energy Minister Dwight Duncan announced on June 14, 2005, that this was no longer possible, and that the Nanticoke Coal Plant will not close until 2009. On May 11, 2005, the McGuinty Liberals delivered their second budget, built around the "Reaching Higher" plan for education. The second year of the four-year plan, this budget was designed to tackle to so-called "education deficit". Investing $6.2 billion over the next four years, the budget included the largest investment in higher education in forty years. It also increased accessibility for low-income students, expanded medical school spaces, and invested in new faculty, graduate scholarships and research. The budget also broke a promise to balance the budget in 2007–08. The government instead aimed at balance in 2008–09. The McGuinty Liberals also moved to expand infrastructure spending by encouraging Ontario's large pension plans to invest in the construction of new roads, schools and hospitals. Specific projects in the budget included a 10-year expansion of the Toronto Transit Commission and GO Transit, 15,000 new affordable housing units and improved border crossings. NDP leader Howard Hampton described this move as "privatization by stealth". During their second year in office, the McGuinty Liberals brought forward a series of negotiations with the province's unions.First, Health Minister George Smitherman concluded an agreement with the province's doctors that included incentives to practice in family health teams or under-serviced communities. Education Minister Gerard Kennedy established a province-wide negotiating framework with the province's teachers' unions with the result that most school boards settled their contracts without lost teaching time. Finally, Management Board Chair Gerry Phillips closed a deal with the provincial government's own civil service union, the Ontario Public Service Employees Union. On June 22, 2005, Education Minister Gerard Kennedy announced that 90–95% of Ontario students between junior kindergarten and Grade Three would be in classes of twenty students or fewer by 2007. He also acknowledged that extenuating circumstances may require slightly larger classes in some cases. Opposition critic Frank Klees accused the McGuinty government of breaking its promise to cap classroom sizes. Kennedy responded that some flexibility is always necessary, and that any reasonable person would regard a 90–95% success rate as a promise kept. Also in June 2005, two cabinet ministers in McGuinty's government were scrutinized for alleged improprieties. Joseph Cordiano faced calls for his resignation after revelations that he billed