***Nice assumption. I don't have to have 99 vils, so I can have more than 50 dragoons if I wish. I can have less. Same goes for you, however it hurts your econ much wrose because you have less vils anyway, and coin is painfully slow to gather.***
The only econ advantage you have over dutch late game is your 99 villies. if you dont have that than a dutch player with 50 villies and 7/8 banks with tulip will easily have as good an econ. And coin is painfully slow how?
8 banks and 2 factories can keep up a nearly unending stream of ruyters and seige. Thats not exactly painful. It only takes about 15 workers on mills to have enough food for unending ruyters also since they are only 30 food each. That leaves 35 workers for wood and whatever else.
***Look up the stats of dragoons vs ruyters. I believe 50 goons have better stats than 100 ruyters. Seriously, look it up.
Also, 50 goons is cheaper than 100 ruyters and 10 falcs, so that isn't really fair.***
Doesnt matter if 50 goons is slightly better than 100 ruyters. nor does it matter if they are cheaper than 100 ruyters and 10 falcs unless you constantly press a dutch player where he can never hit max pop mili wise. Once he starts maintaining a larger army than you, all your "fair" comparisons end. Once he has an army near max 150 to your 100 he will be killing more than he loses.
What matters is the extra 50 mili pop dutch get which when taken advantage of is a gamebreaker. You send your 50 goons against 100 ruyters and 10 falcs and you will get spanked. You cant make halbs or muskets at that point without culverins and you cant make culverins without dealing with the ruyters. If you instantly replace your entire army with culverin and muskets you would do far better.
Add to that the dutch late game econ is weaker than most civs but the boom is possibly the fastest and cheapest and that translates to any dutch player allowed to boom will be done with booming and pumping everything into mili while others are trying to finish off the boom.
There is no civ id rather have than dutch post industrial including french although they are close. The problem with dutch is surviving early.