Under the Constitution, the House of Representatives is responsible for originative all appropriations bills. No money can be spent by the federal government without the House authorizing it.
The Republican Party is currently the majority party in Congress. It has the ability to control federal spending by simply not appropriating money for a program or activity.
I have noticed for decades, it matters not if the Republicans control the House or the Democrats. The wasteful spending will continue. Since 95% of incumbent Congresscritters are reelected every two year cycle, the American people are as complicit with the wasteful as both political parties.
Look in the mirror. If you voted for a Republican or a Democrat to represent you in Congress you voted for the waste.
Who do you suggest we vote for, then? If we don’t vote for a Republican or Democrat, one of them will win anyway.