What is the impact of 2/3rd majority to a functioning government democracy?

The two third majority kills the wisdom of a democratic system.
It leads to anarchy and nepotism.
Is there a way to resuscitate democracy?
Imagine an assembly of 200 members. Suppose a single party or a coalition of parties get a thumping majority.
My proposal is that the winning party/parties should keep 100 plus one vote and donate the others to the opposition.
There is a caveat here.
The opposition should elect 10 "non voting members" excluding the donated ones.
In other words the opposition has 89 votes of discontent to oppose the ruling party/parties.
A no brainer in political wisdom but with an important exception.
In a vital issue the opposition has the right to call the non voting members to aquire the extra vote of the ruling party under its fold making the tally exactly 100.
The result is a tie or stalemate.
The assembly goes into consensus mode of operation.
In this scenario 10 non voting members become the upper assembly of operation once voting power is vested upon them.
This is somewhat of a scientific approach.
I don't think it will ever happen in our august assembly.