I'm from the government and you want me to invest in mental health promotion. Well why should I?

At a societal level, good mental health is an important resource for individuals, families and communities. Mental health is an indivisible part of public health, contributes to the functions of society and has an effect on overall productivity. Mental health contributes to human, social and economic capital. As introduced by Williams and colleagues in this volume (Marshall Williams, Saxena and McQueen, 2005), neuropsychiatric disorders account for 13% of the Global Burden of Disease, with depression alone currently