Tax and taxlike distortions tend to be high and volatile in Africa. These influence the allocation of national wealth and can reduce both the level and productivity of domestic investment. The composition of domestic investment seems to be more important in explaining poor African growth than the level of domestic investment. When leaders have substantial discretion about policy, as they do in most African countries, executive transitions become a major source of uncertainty. Patronage is heavily used in African systems of personal rule.
Governments use distortionary taxes to finance transfers to politically powerful groups.
A government that is captive to a favored group will trade off growth for transfers, if the group is small enough relative to the government's disposable resources. In such a case, conditional aid can be ineffective in spurring growth and investment, even when the potential gains from aid are great. Conditionality is required to secure the gains from aid when nonrepresentative political structures generate a conflict of interest between donors and recipient governments. When donors are in a strong bargaining position, conditionality agreements that mandate a reduction in distortionary taxes will also require that some part of lost revenues be made up by cuts in politically motivated transfers. But policy conditionality is difficult to enforce and even when perfectly enforceable is subject to the problem of aid dependency.