The secondary sector is the sector in which firms use raw materials from the primary sector to manufacture products. This is crucial for the economy as it provides almost all of the goods sold in the market. Without this sector, consumers will not have many of their needs and wants and the economy will struggle to grow. Furthermore, one of the main methods for governments to generate revenue is through taxation, such as Value-Added Tax (VAT). VATs are taxes levied on products bought by consumers and are a major part of the government's revenue. Without the secondary sector, government revenue will fall significantly as most products are manufactured by the secondary sector. Therefore, less money can be invested into the tertiary sector, such as infrastructure, healthcare and education, and the living standards may fall as a result. Finally, many employers work in the secondary sector, working in areas such as engineering, construction and carpentry. Without the secondary sector, these workers may not be able to generate stable income and will have less disposable income to spend on needs and wants, causing the standards of living to fall. On the other hand, the primary and tertiary sectors are also crucial for the economy. The secondary sector relies on the primary sector for the raw materials, and relies on the tertiary sector to sell the product. Furthermore, the tertiary sector has become more important in recent years with the rise of markets like banking and IT technologies. This means that most developed countries, such as the US and the UK, produce most output in the tertiary sector rather than the secondary or primary. Many of these firms in the tertiary sector are also public sector firms, meaning that they play a vital role in government revenue.