earmarks from "fiscal conservative" Baron Hill

From the same article by Maureen Groppe in the C-J...

Solo earmarks by Rep. Baron Hill, D-9th District: $3,009,000 total
-$957,000 to the Ohio River Greenway Development Commission for the Ohio River Greenway project.
-$500,000 to Clark County's Office of Emergency Communications for pictometry for five counties.
-$381,000 to the Ivy Tech Community College in Bloomington for a math and science center.
-$380,000 for railroad bridge repairs in Perry County.
-$300,000 to Jeffersonville for a police data and communications system.
-$167,000 to the Bloomington Hospital Foundation for facilities and equipment.
-$167,000 to expand the emergency room at Bloomington Hospital of Orange County.
-$100,000 to the Clark County Sheriff's Department for radios.
-$57,000 to the Crawford County Youth Services Bureau in Marengo for educational programs for at-risk students.

Joint requests by Hill and other Indiana lawmakers: $2,254,746 total
-$950,000 for a linear park and greenway trail in Bloomington, jointly requested by Sen. Richard Lugar and Hill.
-$500,000 to North Vernon to replace waterlines, jointly requested by Lugar and Hill.
-$475,000 to Indiana University for a park and ride facility, jointly requested by Lugar and Hill.
-$234,746 to Indiana University for equipment for the Indiana Innovation Incubator, jointly requested by Lugar, Sen. Evan Bayh and Hill.
-$95,000 to the Lincoln Hills Development Corp. in Tell City to renovate the corporation's center, jointly requested by Lugar and Hill.

Which of these are the proper purview of the federal government and federal taxation?

The answer: NONE-- constitutionally, ethically, or in terms of efficiency.