I seriously doubt they thought of that. These things will also need new 12 volt batteries too. Plus, how are they going to charge them? Seems like a bad idea to me, and as a California taxpayer living in the Central Valley, I'm probably paying for it.
As California taxpayers, we're all paying for it. Probably Carl Moyer program money. Mostly state (ARB) funding, with a small local match by the air district from the $5 (or whatever it is this week) extra District fee you pay on car registration in the district (8 1/2 San Joaquin Valley counties; eastern Kern is in a separate air district). In terms of Cash for Clunkers, though, replacing an old barely-running ICE beater with a Bolt is probably a Good Thing - zero local emissions, and a much newer/more reliable car. Except, as you say, where are they going to charge them? There are chargers at a few low-cost housing projects in Fresno (see Plugshare); not sure about elsewhere, or at the ag worker housing camps. Also note: most of the Valley is served (serviced, in the agricultural sense?) by PG&E and SCE, except for a few areas in the north Valley that are get power from irrigation districts.