My company has a few hundred employees. Many of them are older with high income. Is it still possible to receive 85-90% of the funding?

Probably not. If you have many, high income employees you may not be able to structure the plan to maximize funding for yourself. You can include certain groups in the plan, and this can help benefit certain employees. But you may want to consider a plan in light of your current employee benefit structure and tax bracket to determine if a plan is right for you.