Standards require a conscience as well as some sort of integrity. To me it would seem that the "ALL MIGHTY DOLLAR" has taken over the republican party. Most of the people n office are already well off, yet they want more. According to AXIOS here is what all representatives in the House and Congress get:

The perks:

Members get annual allowances (averaging $1.27 million in the House and $3.3 million in the Senate) to staff and manage their offices almost entirely as they see fit, as well as for travel and other expenses.
The House has averaged 138 legislative days each year since 2001, and the Senate 162. The job requires long days, and members are often active in their districts when not in session, but how many jobs give their employees over 6 months to plan and schedule entirely as they see fit?
While members of Congress are required to purchase insurance via an Affordable Care Act exchange, they receive a federal subsidy amounting to 72% of their premiums, per Snopes. (Democrats say it's a stand-in for the employer contribution most workers get.) They're also potentially eligible for lifetime health insurance under the Federal Employees Health Benefit Program upon retirement.
Depending on age and length of service, members can receive a lifelong pension of 80% — which, given today's congressional salary of $174,000, equals out to $139,200 in annual taxpayer-funded retirement benefits, per Investopedia.
Upon the death of a member of Congress in office, their family will receive a payout equal to a year's salary ($174,000), per Congressional Institute. The one-time death gratuity for families of military personnel killed in action is $100,000.
https://www.axios.com/2017/12/15/the-perks-of-being-a-member-of-congress-1513307200

In my humble opinion there is no line.