My thesis is:

Our nation needs a health care plan capable of addressing the needs of each individual.
My Question is: How can I make this into a powerful thesis staement?

You could start out by indicating that there is a lack of adequate health care for many individuals in an introductory phrase for that sentence.

Because many people..., our nation needs....

I hope this helps. Thanks for asking

To make your thesis statement more powerful, you can consider the following revision:

"Due to the significant deficiencies in our current healthcare system, it is imperative for our nation to develop a comprehensive and inclusive health care plan that effectively addresses the individual needs of every citizen."

This revised thesis statement highlights the shortcomings of the current system and emphasizes the urgency for a solution that caters to the needs of every individual.