Finally, one part of protecting liberty involves making sure that there is as little poverty as possible. Great poverty breeds crime, which interferes with everyone's liberty and of course prevents the poor themselves from having the mental or material resources to act with full freedom. Protecting freedom directly requires an investment at least in public education and public health, especially for pregnant mothers and young children. Smith supported using tax money for these kinds of measures. Indeed, he gives express approval to progressive taxation, recommending a higher road toll for luxury carriages than for freight vehicles so that "the indolence and vanity of the rich" can be made to contribute to "the relief of the poor."
