There is no one best way to divide equity among co-founders and set founder salaries.
I am generally an advocate of one for all and all for one. Keep the equity equal among founders and keep your base-salaries the same. I have found it tends to reduce these issues as distractions while creating a stronger sense of team. Is it perfect? Nope. But, it has worked pretty well for me.
Here is a good summary of the pros and cons of a fixed approach versus a more dynamic, situational approach.
The key is to have a serious discussion among co-founders before the business is up and running, when everyone is still friendly and everything is still more or less hypothetical. Talk through the various models and don’t come to a resolution until you reach full consensus among the founders.