You want to blame someone for this situation look to the Midwest pilot group and ALPA. They are the ones responsible for allowing such weak scope language in their contract.
Don't blame management. They are just trying to reduce seat mile cost. They are loyal to stock holders and no one else. The weak scope in the pilot contract has afforded them the opportunity to outsource the flying.
Don't blame the RAH pilot group. They have no legal recourse to stop this flying. They can not refuse to bid the 190. There is no bid to refuse. It will just show up on a pairing one day. The only immediate pilot input will be if the 190 is actually configured for 100+ seats. Current pay only works to 99 seat aircraft. There is specific language in the CBA to govern how a larger aircraft on the property are handled. Long story short there will be a negotiation for the pay rate and the pilots are required per the CBA to operate the aircraft in the interim period while the pay scale is being negotiated.
The legacy/mainline pilot groups are responsible for the constant erosion of scope. The vast majority of the pilots operating in the entire regional market want to move on one day to a mainline job. Those opportunities are being squandered by short sighted mainline pilots ratifying CBAs with loose unenforceable scope. I am pretty sure that every pilot operating "large" rj aircraft at PSA, Mesa, RAH etc. would much rather be flying that aircraft for the legacy who's name is painted on the side of the aircraft.
Also stop calling those guys scabs. They are not scabs. Those of you saying that are childish and ignorant. You are also drawing attention away from the real problem: mainline scope.