What are your thoughts on a reward to the person that takes down a mass shooter?

After reading about the shamefully poor Texas police response to the Uvalde shooting my mind began tossing around other scenarios.
Would the officers have continued to stand around if someone offered a $20,000, or $50,000, or $100,000 reward to the person who first disabled or killed the shooter? Would that have shortened the response time?
According to the latest numbers 400 officers were at the site doing virtually nothing. The “security” camera footage shows what appears to be a lot of standing around, looking at phones, and talking. I did a quick calculation a figure society spent $320,000 for salaries and benefits on that incident not including the value of 21 lives, and the medical bills which will run to the $10’s of millions.
According a several studies only about 3% of mass shooting were stopped by “a bystander with a gun.” The most recent mall shooting in Indiana is an example.
Would people be quicker to act if a financial reward were offered for taking the risk and acting to save the lives of others?
I find it incredible that I am even thinking about this.
What are your thoughts?