It makes sense to equally split to equally motivate though.
Yes, otherwise you have one founder with all the weight on her/his shoulders and the others can end up like employees. It's not worth it: Result= Everyone's equity will be worth less in the end because they don't perform with the motivation of an equal team.
Also, being in that majority equity role really stinks. It's harder to take time off, people hesitate to make decisions without you...
I DONT expect work to be evenly divided tho. Just like in marriage, it is rare for a perfect 50/50 split of work. Some people are motivated to work until 4 AM each nite, and others are not. I think accepting that is important for a happy, successful partnership.
Remember, vesting is almost as important(in my book, even more) than the % equity.
Of course, you want to get both right. Just don't forget the latter.