Maybe the answer is to simply reverse the order in which you roll for the research and development. At the start of your turn pick the chart you want, roll a die and see what technology breakthrough you will get if you invest.
IE, your scientists make you a proposal of what they intend to develop. Now once you know what you will get, you determine how many dice you want to roll to get that technology. If its something you don’t want or need, you don’t have to roll at all. If it’s something you really covet, then you can “invest” lots of dice into the roll to make the breakthrough more likely.
This does not change the overall chance to get anything, but no government would be wasting a large portion of its budget to have their scientist come up with Paratroopers, where as a proposal for Jets or Super Subs would likely see a considerable number of dice rolled.
If your scientist come to you with the idea for Rockets, now you have to decide will you put a lot into this development this turn (die roll)? if you do and still don’t get it you could bust your budget or if you pass (don’t pay for a die roll) next turn you will likely not have the opportunity again.
After all, you don’t go out and spend money on lottery tickets not knowing how much the jackpot is worth. With this method you will see more technology attempts since you will know what your going to get!
What U think?
Kim