EUROPE’S largest pension fund, a scheme for Dutch public-sector workers called ABP, is much feted abroad for its efforts in “sustainable” investing. At home, however, where it provides pensions to one in six families and manages nearly one-third of pension wealth, it is suffering a crisis of confidence.By international standards, Dutch pensions are extremely generous overall, offering 96% of career-averagesalaries (adjusted for inflation), compared with an OECD mean of 63%. And they are solid. Thanks to mandatory, tax-deductible saving, the Dutch have stored up a collective pension pot of nearly €1.4trn ($1.6trn), roughly double GDP.