Barry Bonds Perjury Trap

On Thursday, his very freedom was put in jeopardy when a federal grand jury indicted him on five felony counts of perjury and obstruction of justice, charges that could result in a maximum sentence of 30 years in prison if he's convicted.. . . .

Here are my questions:

1) Why wasn't he charged with illegal drug use? I have a hard time with these perjury charges where there is no claimed underlying crime.
2) Let Baseball deal with this. Why should this be something that prosecutors spend a lot of time dealing with?