Independent Botswana has developed on three main pillars: rapid and sustained economic growth (over the decade to 1992, for example, at 8.4 per cent a year, third-highest among all developing countries, and far in excess of any other in Africa); multi-party or liberal democracy; and an efficient central state, the main features of which have been identified and praised by observers. With growth, an accompanying build-up of a relatively strong governmental system took place, with activities especially focused on finance and planning. The civil service was maintained at a high level, according to Ravi Gulhati, by avoiding rapid localisation, by providing high compensation for officials, and by keeping well-defined lines of authority and accountability. Able people were placed in key positions and kept there for extended periods. The political elite fairly consistently sought expert advice from leading bureaucrats, and the two groups have displayed a closeness and mutuality of interest built upon their common involvement in cattle and commerce, and the not uncommon tendency for cabinet ministers to arise from the ranks of the senior bureaucracy.