Zardnaar
Deity
Well, that's why it's so important you make it a group marriage instead of one of those stupid old poly marriages that are the problematic practices associated with "religious types." A retrograde poly law would be retrograde. If the statute specifies that sister wives are each other's wives and that the dude is an even share of the stuff rather than half, then I don't see a problem with the boilerplate. I'm hard pressed to see how allowing this with rights and protections commensurate is a worsening of, say, mistress culture or all these existent abuses that around around now and will still be around later.
The most cogent arguments I've seen all revolve around "Mormons suck" or "Muslims suck" or "Men suck" or now, I guess, even talking about it is harmful - so shut up and get in line and yes, other people's genitals are definitely my business for their own overridden-self-interest. Pursuit of Happiness, so long as it makes me happy.
Your right to pursue happiness is always curtailed by society. Some people like getting drunk but that impacts society.
This also impacts it. Men gave more money, and thus will impact women more.
You can already live this way if you want, here we gave laws protecting kids born out of wedlock. Something like 1 in 3 kids parents aren't married here.
So yes a women could theoretically have two husband's but that's not going to be as common as the other way around.