a) There is growth in the investment in physical capital, like when a manufacturer expands their factories. This will lead to increased employment in those factories, meaning jobs are created and average disposable incomes across the economy will rise.
b) Investment in financial capital (like stocks) will mean that businesses have more money. Businesses can spend this money on research and development, product improvement, or on hiring new people. In addition to job growth, businesses will also be able to enhance the services or goods that they provide, which increases the well-being of consumers. In their impact, debaters should note that both businesses, job-seekers, and consumers benefit from higher investment.