Why did the July Monarchy dispense with Montgaillard's services?

Question

This guy, Count Montgaillard, seems to have switched allegiances as often as he used to breath - he was an aristocrat and en emigre who then served the Republic, the Bourbon princes, again the Diectory, Napoleon, and again the Bourbons. (And to be sure he was not a tecnhocrat but rather a political adviser, a profession that does not usually enable one to change employers in such a way). However, all things come to an end ans wikipedia informs us that:

His career ended after the July Revolution, and he died in obscurity at Chaillot.

I wonder why? Did he get too old to perform the allegiance switch trick one more time? Did he genuinely tire of politics (not likely, null hypothesis)? Was he compromised in the eyes of the new regime by some special bad turn he had done them? Something else I am missing?

Answer 1

Turns out this fellow was a historian, keeping himself very busy after his retirement from public service by proceeding to write History of France between 1787 and 1825.
Volume 1 was published in Paris in 1832;
Volume 2 was published in Paris in 1832;
Volume 3 was published in Paris in 1833.

Update:
Yes, the French government did supply pensions to some classes of workers prior to Bismarck (my emphasis):

Starting from 1679 sailors were allowed a pension if an injury stopped them from working and in 1709 all fishing and merchant sailors were granted a retirement pension. During the 19th century, various other professions were granted pensions, including employees of the Banque de France, employees of the Comédie-Française, civil servants, national rail employees, and miners.