I Agree - Bigger Pipe
The problem with small suction pipe is that it is equivalent to making your well deeper. Pulling 20 GPM through 60 ft of 1" pipe gives you 15 ft additional suction loss. Add that to the depth to water in the well and you see that you could have the biggest pump in the world and would never get 20 GPM.
If you put in a bigger pipe, you might as well lay 2" from the well to the house.
Since this is irrigation, the easiest thing you could do would be to put that 1 1/2 HP pump on a plank, carry it over to the well, drop a piece of 2" PVC down the well with one of those 2" plastic foot valves, elbow it at 2", and reduce to 1 1/2 right at the pump. Be sure that you use Schedule 40 fittings; NOT DWV.
You can get an inexpensive plastic union at HD to make it easy to take apart in the fall. Make sure you have a good way to prime the pump, with a tee and valve on the outlet. I have seen people put the pump in a little "dog house" if you don't want to look at the pump. It is easy to run a piece of 12/2 UF underground; assume you are using 230 Volts on the pump.
But I would do that only after finding the model number of the pump and finding that it will produce the pressure and flow that you need.
If you decide to get a new pump and the well will accept it, a low-head submersible will do a great job, probably at less horsepower than the pump you have and certainly less power than a jet pump with equivalent flow. For example, a 3/4 HP Goulds 18GS07 will give you 25 GPM at just under 40 psi and you could get a 1 HP pump if you want more pressure. You will not find a low head submersible at a big box store. You need to get the pump head matched to the motor. Another advantage of the submersible is that it will put 25 GPM through 60 ft of 1" discharge pipe with about 10 psi of pressure loss; not desirable but it will work.
You can also find a submersible at Grainger. Check out the 1 HP Stock No 4TB70 which will give you 25 GPM at 40 psi.