The time norms between promotions pretty much guarantee that you will not hit 10k within 7-8 years.

Assuming you get your cohort promotion in one year, get promoted every two years thereafter, and receive a high (A grade) merit increment in the years you don't get promoted, you still won't be at 10k after 8 years. Even with the ideal situation described above, which is exceedingly rare, you will only be at the lower end of the SEO1 scale, drawing about 7k.