All the recent talk about “affordability” was just talk. That’s the message the Los Angeles County Board of Supervisors sent this week when they voted to propose a 0.5% sales tax . That would push sales taxes in LA County — already among the highest in the country — from 9.75% to 10.25%. And that would be even higher in some cities. Four of the board’s five members — Hilda L. Solis, Holly J. Mitchell, Lindsey P. Horvath, and Janice Hahn — voted in favor of the sales tax hike. Only one — the