Change labor laws to permit flex time?

Existing laws prevents flex time, which would permit selected workers to come and go as they pleased except when such would seriously lower over all productivity. Some employees would work a few extra minutes to complete the task they were on, instead of leaving it for the next time they come to work or having another employee complete the task. A lot employees on flex time would allow the employer to work projects any number of minutes per day and week and month instead multiples of 480 minutes (8 hours) It would reduce the size of parking lot, as workers could arrange to car pool more conveniently and the plant would be opened more hours per week. It would also stretch out the local traffic rush hour making it less severe. It could reduce the need for personal days, sick days, vacation days. The employer should pay premium pay for some hours of the day and pay over time when they want the employee to stay past the time the employee planned to leave, even if much less than an 8 hour day and/or much less than a 40 hour week. Perhaps best of all, employees could choose to work part time for extended periods, which would create jobs for more employees, reducing unemployment. Neil