PERM applies to both EB2 and EB3 (so in real world anyone making from as low as $50k+/year depending on role qualifies) and most bodyshops apply for green card for all employees - it's just part of business cost. For EB2 PhD is not needed - MS from online paper mill is enough. For EB3, any degree works.
It's not tens of thousands in cost - it's below $10k all in. PERM Fees to USCIS are around $1200.
The whole system is abused to the end and need to be completely gutted and redone so high end engineer working for Google making $700k was differentiated from Wipro employee making $80k. Right now they are in the same queue. Prevailing wage is a joke as it does not include stock options and does not reflect real salary levels.