There are some teachers who succumb to the pressure and cheat. (I believe most do not.) There are some who become bitter and take it out on the kids. (Most do not.) But I can safely say the majority of teachers became teachers to work with kids and make a positive impact on their lives. (It's definitely not for the pay!)
Teachers know where the blame lies when it comes to mandated state and federal testing, and it is not the kids. Teachers want an end to the excessive testing, and most people don't realize this, but teachers are the low man on the totem pole. A step above the custodian. They have little, if any power, over what testing they give, or how it is given. And test scores should NEVER be tied monetary gains or losses. It's not fair to the kids or the teacher.
Kids are more than a test score, and there are more (and better) ways to judge the success of a school.