It's completely natural for A level college students to think about their future earning potential, but basing a degree choice on a future pay cheque may not be the best way to go. What if you choose a course that could lead to great money, but you hate studying it? Research has shown that those who enjoy their course achieve better grades, which is why choosing a subject you are not going to enjoy for the sake of a high salary could backfire.
The article linked below explores why university admissions tutors give preference to those who can show real passion for the subject they have chosen, and why a money chasing attitude may be detrimental to your application process
Article: Advice for A-level college students: stop chasing a high salary when choosing a university course