Actually, they don't have enough stuff, because it's very expensive and they can't afford it. Having round the clock intel from drones and satellites, on-call artillery fire and on-call CAS were essential for getting ground troops out of trouble while coalition forces were in Iraq. Without these elements, coalition casualties would have been far higher. Most of the equipment the Iraqis have, they acquired at cut-rate prices from the US. The problem is the gaps in their inventory - stuff we weren't prepared to sell for pennies on the dollar to them.
Iraq's mil budget is $6b - which, for a country fighting a major insurgency, is peanuts and pretty much just covers the cost of maintenance, salaries, ammo and fuel, and maintenance is probably being shortchanged. To make headway, they need drones, combat aircraft and significant amounts of training, which will cost tens of billions, especially if they plan to acquire modern jet fighters which cost $100m apiece (with spares and maintenance packages).
Bottom line is they dragged their feet on mil expenditures and are now paying the price. Iraq produces 1/3 as much oil as Saudi Arabia but has less than 1/10 the defense budget. And it's fighting a major insurgency. My guess, based on the region's traditions, is that Iraq's leaders are too busy depositing the profits from oil exports in numbered private Singaporean bank accounts to worry about defense. If things go south, they're going to Singapore.
The problem with that statement is the facts on the ground, of who is kicking their butt and with what.
I guarantee that M1 Abrams was superior to anything that ISIS had, yet, the M1 is burning.
They don’t need jets, CAS props would do the job nicely. Heck a squadron of Wart Hogs would do the job nicely. Bet they could pick them up fairly cheap.