I think if u see today economic scenerio CA's requirement is increasing day by day and this profession is going close to MBA in tems of salary package .A CA work in various field like Financial analyist , Auditors, Tax consultant,Assurance and Risk analysis, Finance Management, Payroll Mgt etc.In knowlede or area of work options a ca is far ahead from a MBA.Doing CS along with CA increase his/her knowlede and scope of work.