I was wondering if you ever tought about the political situation of the Netherlnds. The Dutch Republic in the second half of the 18th century was incredibly unstable and corruption was at an alltime high. Together with other economic problems, the Dutch republic was in trouble. Although the French puppetation and later occupation of the Netherlands was very bad for the Netherlands, it did give the Netherlands a chance to start over. Whatever you say about the kingdom of the Netherlands in the 19th century, which was far less wealthy and important than the Dutch republic, it was far more politicaly stable and that stability laid the foundation of the wealthy Netherlands of the 21st century. Something I don't think the Dutch Republic would be able to, unless some significant internal changes were made.
For example Brabant, Zeelandic Flanders and what is now part of Limburg were not treated the same as the seven provinces. They were generality lands, ruled directly by the Estate-General, instead of by a provincial Estate, like the provinces were. If the Netherlands absorbs Flanders, I don't think they could get away with treating them as second class citizens.
Another problem was the almost complete domination of the Republic by the province of Holland (which was mostly dominated by the city of Amsterdam). There were several more things, I won't bore you with, like the patriots, the stadholder, etc. In the end something has to change. Of course it doesn't need an occupation by a foreign country. It can come from within. But still.