1) that doesn't prevent you from asserting defenses if you are sued;
2) the government's actions can effect a waiver of immunity in specific cases;
3) the government has waived immunity by statute in a very broad range of situations;
4) it doesn't stop you from suing government officials in their personal capacity.
For example, if the government breaches a contract with you, you can sue it because the government has broadly waived immunity in contracts cases. You can sue federal agencies for their actions under the Administrative Procedure Act. As an example of (4) see: Bivens v. Six Unknown Named FBI Agents.
Also, habeas corpus offers a way to challenge actions that result in detention without needing to sue the government per se.
1) that doesn't prevent you from asserting defenses if you are sued; 2) the government's actions can effect a waiver of immunity in specific cases; 3) the government has waived immunity by statute in a very broad range of situations; 4) it doesn't stop you from suing government officials in their personal capacity.
For example, if the government breaches a contract with you, you can sue it because the government has broadly waived immunity in contracts cases. You can sue federal agencies for their actions under the Administrative Procedure Act. As an example of (4) see: Bivens v. Six Unknown Named FBI Agents.
Also, habeas corpus offers a way to challenge actions that result in detention without needing to sue the government per se.