If you are diagnosed with "Abnormal Cells" this just means they are different to when last checked.It doesnt mean they are Cancerous.
Most cells that are lasered,are Pre-Cancerous Cells which means they may turn cancerous within 10-15 years.They also may not.
It is most definitely NOT to do with money,it is based on Research. Cervical Cancer is virtually non-existent under the age of 25 years.
There will always be exceptions,and that is why anyone who presents with Clinical problems such as bleeding between periods or after sex WOULD have a smear done.
Due to more frequent change of partners etc. under 25 yrs it is more likely you would have STI's,so would be advised to go to an STI Clinic,if the symptoms point that way.
Obviously,Ovarian and Uterine Cancers could strike before the age of 25 yrs,and could represent some of these cases.Sadly,the Smear test can't test for these.