Tom Steyer’s campaign for California governor is spending money at a feverish pace, and the only prescription appears to be another fat sack of cash. New campaign filings show Steyer — a former hedge fund capitalist turned lefty environmentalist and major Democratic donor — gave his campaign another $28.5 million this month, bringing his personal stake in the race to $66.7 million. The outrageous surge in spending — Steyer is on pace to smash Meg Whitman’s gubernatorial campaign spending record of $144 million if he emerges out of the primary — has coincided with polling that has markedly improved in the months since he launched his campaign in November.