4 wives is allowed in this world to take care of orphans or similar intentions. The norm should be in this world one wife, because, population problems would occur and corruption would occur if this doesn't happen.Why should wine and more than 4 wives be forbidden in this world, but same is allowed in Heaven?
The next world is a reward and doesn't have the population problem.
As for wine, I already explained it from my perspective so won't repeat.