Yes, and no loopholes.

So, we need to also include:

1) Retirees
2) People who had help from their parents
3) Homeowners on disability
4) Students going back to school
5) People who have lost their jobs

Or are you going to have exemptions for all of the above? Because your exemption is someone else's loophole. 

The 15% tax was about as 'loophole proof' as you could get. And even then, people have been saying how easy to get around it it is.

Good luck policing your policy.