The move could result in a shift of more overall compensation to tips, the study said.
The estimate is more than double the cost of the original Trump tax cuts.
Some breaks include tax child tax credits. Others could boost the stocks of some companies.
A bill with corporate tax breaks and a child tax credit is still being haggled over.
House Judiciary Chairman Jim Jordan is working on subpoenas for BlackRock and State Street.
Aid to Israel, generally agreed upon, is now tangled in partisan tax arguments.
A government shutdown would have a cascading economic impact, starting slowly and snowballing over time.
Senate Republican and Democratic negotiators are nearing a deal on a short-term spending measure.
Congress hasn't yet approved any of the 12 annual spending bills that typically fund the government.
Unlike Washington's last fiscal crisis earlier this year, a government shutdown wouldn't risk a US default.