You don't lose money fom wasted MP... any money you don't spend on a ship you built in that turn goes to your treasury |
Not sure if I understand you correctly, so sorry if this is what you do mean.
A planet has 500 MP and builds a ship that has a cost of 100. You do pay 500 bc and not only 100bc.
Rather than having rollover for production (which is obviously not going to happen

), atleast have a check against the remaining cost of a ship being built. Anything over the remaining cost should be removed from spending. It's removed from spending because that's how it
actually works. A planet with MP that isn't building a ship doesn't put that as Military Spending and then send that into income, rather it isn't spent.