I rented apartments for over twenty years and NEVER had one lease which had an open ended payment contingent upon taxes being added. Of course, sales taxes were irrelevant to the rent calculation but if property taxes went up doing the lease period the property owner ate the increase.
Of course, as a landlord, you can give away any freebies or profits you want. No one is forcing you to charge the maximum you get either. You can eat the utilities if you want. You don't even have to demand a security deposit. You don't even have to make a profit. ;)
But most businesses are not run that way.