Charles Schwab, a San Francisco-based brokerage and banking corporation, wants an $8.5 million economic incentive agreement from Travis County to expand its offices in Austin. If the Travis County Commissioners Court approves the motion at Tuesday’s meeting, the corporation will also get $4.5 million from the state. The Greater Austin Chamber of Commerce and the Greater Austin Asian Chamber of Commerce support the agreement, while local taxpayer organizations like ChangeAustin.org oppose. Under the agreement, the corporation would invest $210 million, build 250,000 to 300,000 square feet of office space on a 50-acre plot and hire 823 new employees.