They just procrastinate on their own rather than corporate laptop when at home. The solution is to make work about delivery rather than hours on a chair. If someone can do it in 20 seconds then good for them, less good for you (not personally) in terms of how efficient you are in allocating work and managing its delivery. Very few employees are motivated to do more than asked for them. The rest are not the exception but the norm, and getting them back in office with unchanged work management will only help in having them look elsewhere. That’s a motivation perhaps but if you have work to do you still need to improve because the next round of employees will be similarly distributed.