[bluehatbrit]

All of these are the problem of the business, and negatively impact the employees ability to disconnect and enjoy their free time.

If you need an executive assistant to be available in the evenings, hire evening cover. If it's not worth it to the employer pay for that cover, then why should it be on the employee to do that work for free during their time off?

Employers need to remember that employees often don't have a stake in the business. Free extra work gains them nothing, and loses them what little free time they had. That's not a trade, it's theft of time through a power imbalance.

It's reasonable for a business to pay the proper price for the full services it receives from it's staff. Businesses have proven they're unable to be fair in this regard, so it's reasonable to regulate them.