<human>:  Why did the National Party introduce the budget in the year 1948?
<bot>: The National Party was the ruling party of South Africa from 1948 to 1994. The National Party was in power from 1948 to 1994, so they were responsible for the introduction of the budget. The National Party introduced the budget in 1948 because it was a way to keep the government running smoothly and to control the budget.