Earlier quoted context omitted.
Thats a solution thats used to be common for well run large shops(well sometimes using things like remotely accessed hardware prior to modern virtualization) but as this creates work and expenditure for the client many smaller outfit's kind of want it both ways and expect the contractor to fund hardware/software completely identical to what their IT is deploying for employee's.
If you can pay 7500$/y for spyware you can surely pay for a VDI-Product.
For large companies supplying VDI to consultants tend to be an standardized package that gets billed back to whatever project is hiring the consultants but for mid-sized organisation VDI is a big scary word that's going to require special handling.
Most desktop support teams are completely dependent on standardization to the point where they tend to turn into complete control freaks, that panic at the thought of anything that is not "by the book", so they often just apply the book without additional budgets to external consultants.