It must be followed by conviction in the Senate to effect removal from office. Upwardly mobile people who are tied closely to their districts. Nominees win party primary elections. Make populations equal and protect incumbents. The Constitution restricts what the legislature can do and when it can do it.
Power is concentrated in the leadership.
The Little Legislatures dominate their respective areas. Parties and caucuses do not count for much. To prevent it from becoming law requires only successful blockage at one of these obstacles. They are often different. The Texas Legislature is more severely restricted than the legislatures in most of the other large states.