Hi
MBA and MCA both have good scope but it depends upon you capability

Mba-Master of business administration
Mca- Master of computer application

MBA and MCA good courses both are capable of getting good jobs but both are different field if you do MCA and MBA in good colleges which have better campus placement you will get good job otherwise it is difficult to find jobs outside ,
getting high salary is not depends on what courses you have studied ,in MBA it depends on which good company you will get generally MBA company offered high salary package for you can go for management side for HR and,software side where as MCA there is a chance to get jobs in software also software company provides good salary package
regarding MBA salary people get more then MCA since they help in reviewing the business policies of the company which state highway leads to profit

Hope this information is helpful

All the best