[kenty]

After US withdrawal the Taliban probably had a massive financial advantage. They probably used the last years to save up billions which they used to buy them a "critical mass" of fighters that would steamroll the country with no chance of resistance.

Even when factoring out corruption, the government's ability to muster up funds for keeping it's own military is severely hindered by them having to upkeep basic services throughout the country and having to go through the usual government bureaucracy.

Now the tables have turned somewhat and being faced with the cost of occupying the country, the Taliban will have trouble keeping their freckle allies.