Because of course they would!
Republican legislators want to keep popular Obamacare provisions for themselves and their staff.
House Republicans appear to have included a provision that exempts Members of Congress and their staff from their latest health care plan.
The new Republican amendment, introduced Tuesday night, would allow states to waive out of Obamacare’s ban on pre-existing conditions. This means that insurers could once again, under certain circumstances, charge sick people higher premiums than healthy people.
Republican legislators liked this policy well enough to offer it in a new amendment. They do not, however, seem to like it enough to have it apply to themselves and their staff. A spokesperson for Rep. Tom MacArthur (R-N.J.) who authored this amendment confirmed this was the case: members of Congress and their staff would get the guarantee of keeping this Obamacare regulations.
IIRC, Republicans first attached a rider to the ACA requiring members of Congress to use the Exchanges instead of maintaining their tax-payer provided insurance, thinking that Democrats wouldn't go along, and were surprised when the Democratic caucus went along with it. Now, they realize that the ACA isn't a bad thing, but they want to "repeal" it, because they've complained for years how "bad" it is, while retaining the best benefits for themselves.
Typical.