Final answer:
The acquisitive model best accounts for why bureaucracies tend to push Congress for increased funding each year, as it highlights the desire of bureaucracies to expand their influence and resources.
Step-by-step explanation:
The model that best explains why bureaucracies tend to push Congress for more funding each year is the acquisitive model. This model suggests that bureaucracies are inherently motivated to maximize their budgets in order to increase their own influence, power, and stability. In contrast, the Weberian model emphasizes a structured and efficient organization that operates under a consistent system of rules and procedures, but it doesn't inherently account for the push for increased funds as the acquisitive model does. The monopolistic model compares bureaucracies to monopolistic businesses that lack competition and therefore have no incentive to be efficient, which can lead to increased costs over time, including the seeking of additional funds. Lastly, the ideal model represents a theoretical, perfectly efficient and rational organization, which is not a reflection of the real-world behavior of bureaucracies seeking more funding.