Meanwhile, you destroy lives as post-docs, research associates funded by that grant lose their jobs suddenly and have to scramble to find a new one. Again, you

Meanwhile, you destroy lives as post-docs, research associates funded by that grant lose their jobs suddenly and have to scramble to find a new one. Again, you appear to want dis-incentivize honesty. That this researcher was honest makes their future research twice as productive in my eyes. Not only are they less likely to make that kind of mistake again, you can probably trust them to not lie about their research.