Eliminating baseline budgeting would force Congress and government agencies to really look at spending. Agencies would have to come to Congress and request monies for the year and if Congress did not agree they could use their power of the purse.
For those from Rio Lynda here is what baseline budgeting:
Baseline budgeting is an accounting method the United States Federal Government uses to develop a budget for future years. Baseline budgeting uses current spending levels as the "baseline" for establishing future funding requirements and assumes future budgets will equal the current budget times the inflation rate times the population growth rate