Data such as people's Social Security numbers, dates of birth, salaries, home addresses, job descriptions, and disciplinary records are extremely sensitive and need robust cybersecurity protection.
Trump granted Elon Musk and his 18-24 year old staffers full access to copy and otherwise this data without those staffers being properly vetted for any level of security clearance.
This data will have catastrophic effects in compromising our nation when it falls into the wrong hands, such as those of corrupt officials or countries like Russia or China, and Trump carelessly handed it over to people who have little to no experience with securing it appropriately.